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      1 %Clause Contingente 01 - jc
      2 \begin{frame}
      3 \begin{figure}[h!]
      4   \centering
      5   \begin{tikzpicture}[
      6       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
      7       lettre/.style={
      8         on chain,
      9         draw,
     10         circle,
     11         minimum size=1cm
     12       },
     13       chiffre/.style={
     14         node distance = 0.75cm
     15       },
     16       arr/.style={
     17         ->,
     18         >=triangle 90
     19       }
     20     ]
     21     \node[lettre] (1) {$\lnot x1$} ;
     22     \node[lettre] (5) {$x2$} ;
     23     \node[lettre] (3) {$\lnot x2$} ;
     24     \node[lettre] (6) {$x3$} ;
     25     \node[lettre] (4) {$\lnot x3$} ;
     26     \node[lettre] (7) {$x4$} ;
     27     \node[lettre] (2) {$\lnot x4$} ;
     28     \node[lettre] (8) {$x1$} ;
     29 
     30   \end{tikzpicture}
     31   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
     32   \label{fig:clause-conting}
     33 \end{figure}
     34 \end{frame}
     35 
     36 %Clause Contingente 02 - jc
     37 \begin{frame}
     38 \begin{figure}[h!]
     39   \centering
     40   \begin{tikzpicture}[
     41       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
     42       lettre/.style={
     43         on chain,
     44         draw,
     45         circle,
     46         minimum size=1cm
     47       },
     48       chiffre/.style={
     49         node distance = 0.75cm
     50       },
     51       arr/.style={
     52         ->,
     53         >=triangle 90
     54       }
     55     ]
     56     \node[lettre] (1) {$\lnot x1$} ;
     57     \node[lettre] (5) {$x2$} ;
     58     \node[lettre] (3) {$\lnot x2$} ;
     59     \node[lettre] (6) {$x3$} ;
     60     \node[lettre] (4) {$\lnot x3$} ;
     61     \node[lettre] (7) {$x4$} ;
     62     \node[lettre] (2) {$\lnot x4$} ;
     63     \node[lettre] (8) {$x1$} ;
     64    
     65 
     66     \draw[arr] (1) -- (5) ;
     67 
     68   \end{tikzpicture}
     69   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
     70   \label{fig:clause-conting}
     71 \end{figure}
     72 \end{frame}
     73 
     74 %Clause Contingente 03 - jc
     75 \begin{frame}
     76 \begin{figure}[h!]
     77   \centering
     78   \begin{tikzpicture}[
     79       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
     80       lettre/.style={
     81         on chain,
     82         draw,
     83         circle,
     84         minimum size=1cm
     85       },
     86       chiffre/.style={
     87         node distance = 0.75cm
     88       },
     89       arr/.style={
     90         ->,
     91         >=triangle 90
     92       }
     93     ]
     94     \node[lettre] (1) {$\lnot x1$} ;
     95     \node[lettre] (5) {$x2$} ;
     96     \node[lettre] (3) {$\lnot x2$} ;
     97     \node[lettre] (6) {$x3$} ;
     98     \node[lettre] (4) {$\lnot x3$} ;
     99     \node[lettre] (7) {$x4$} ;
    100     \node[lettre] (2) {$\lnot x4$} ;
    101     \node[lettre] (8) {$x1$} ;
    102    
    103 
    104     \draw[arr] (1) -- (5) ;
    105     \draw[arr] (3) -- (8) ;
    106   \end{tikzpicture}
    107   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    108   \label{fig:clause-conting}
    109 \end{figure}
    110 \end{frame}
    111 
    112 %Clause Contingente 04 - jc
    113 \begin{frame}
    114 \begin{figure}[h!]
    115   \centering
    116   \begin{tikzpicture}[
    117       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    118       lettre/.style={
    119         on chain,
    120         draw,
    121         circle,
    122         minimum size=1cm
    123       },
    124       chiffre/.style={
    125         node distance = 0.75cm
    126       },
    127       arr/.style={
    128         ->,
    129         >=triangle 90
    130       }
    131     ]
    132     \node[lettre] (1) {$\lnot x1$} ;
    133     \node[lettre] (5) {$x2$} ;
    134     \node[lettre] (3) {$\lnot x2$} ;
    135     \node[lettre] (6) {$x3$} ;
    136     \node[lettre] (4) {$\lnot x3$} ;
    137     \node[lettre] (7) {$x4$} ;
    138     \node[lettre] (2) {$\lnot x4$} ;
    139     \node[lettre] (8) {$x1$} ;
    140    
    141     \draw[arr] (1) -- (5) ;
    142     \draw[arr] (3) -- (8) ;
    143     \draw[arr] (4) -- (7) ;
    144   \end{tikzpicture}
    145   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    146   \label{fig:clause-conting}
    147 \end{figure}
    148 \end{frame}
    149 
    150 %Clause Contingente 05 - jc
    151 \begin{frame}
    152 \begin{figure}[h!]
    153   \centering
    154   \begin{tikzpicture}[
    155       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    156       lettre/.style={
    157         on chain,
    158         draw,
    159         circle,
    160         minimum size=1cm
    161       },
    162       chiffre/.style={
    163         node distance = 0.75cm
    164       },
    165       arr/.style={
    166         ->,
    167         >=triangle 90
    168       }
    169     ]
    170     \node[lettre] (1) {$\lnot x1$} ;
    171     \node[lettre] (5) {$x2$} ;
    172     \node[lettre] (3) {$\lnot x2$} ;
    173     \node[lettre] (6) {$x3$} ;
    174     \node[lettre] (4) {$\lnot x3$} ;
    175     \node[lettre] (7) {$x4$} ;
    176     \node[lettre] (2) {$\lnot x4$} ;
    177     \node[lettre] (8) {$x1$} ;
    178    
    179     \draw[arr] (1) -- (5) ;
    180     \draw[arr] (3) -- (8) ;
    181     \draw[arr] (2) -- (6) ;
    182     \draw[arr] (4) -- (7) ;
    183   \end{tikzpicture}
    184   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    185   \label{fig:clause-conting}
    186 \end{figure}
    187 \end{frame}
    188 
    189 %Clause Contingente 06 - jc
    190 \begin{frame}
    191 \begin{figure}[h!]
    192   \centering
    193   \begin{tikzpicture}[
    194       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    195       lettre/.style={
    196         on chain,
    197         draw,
    198         circle,
    199         minimum size=1cm
    200       },
    201       chiffre/.style={
    202         node distance = 0.75cm
    203       },
    204       arr/.style={
    205         ->,
    206         >=triangle 90
    207       }
    208     ]
    209     \node[lettre] (1) {$\lnot x1$} ;
    210     \node[lettre] (5) {$x2$} ;
    211     \node[lettre] (3) {$\lnot x2$} ;
    212     \node[lettre] (6) {$x3$} ;
    213     \node[lettre] (4) {$\lnot x3$} ;
    214     \node[lettre] (7) {$x4$} ;
    215     \node[lettre] (2) {$\lnot x4$} ;
    216     \node[lettre] (8) {$x1$} ;
    217     
    218     \node[chiffre, above right of=1] {1} ;
    219 
    220     \draw[arr] (1) -- (5) ;
    221     \draw[arr] (3) -- (8) ;
    222     \draw[arr] (2) -- (6) ;
    223     \draw[arr] (4) -- (7) ;
    224   \end{tikzpicture}
    225   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    226   \label{fig:clause-conting}
    227 \end{figure}
    228 \end{frame}
    229 
    230 %Clause Contingente 07 - jc
    231 \begin{frame}
    232 \begin{figure}[h!]
    233   \centering
    234   \begin{tikzpicture}[
    235       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    236       lettre/.style={
    237         on chain,
    238         draw,
    239         circle,
    240         minimum size=1cm
    241       },
    242       chiffre/.style={
    243         node distance = 0.75cm
    244       },
    245       arr/.style={
    246         ->,
    247         >=triangle 90
    248       }
    249     ]
    250     \node[lettre] (1) {$\lnot x1$} ;
    251     \node[lettre] (5) {$x2$} ;
    252     \node[lettre] (3) {$\lnot x2$} ;
    253     \node[lettre] (6) {$x3$} ;
    254     \node[lettre] (4) {$\lnot x3$} ;
    255     \node[lettre] (7) {$x4$} ;
    256     \node[lettre] (2) {$\lnot x4$} ;
    257     \node[lettre] (8) {$x1$} ;
    258     
    259     \node[chiffre, above right of=1] {1} ;
    260     \node[chiffre, above left of=2]  {2} ;
    261 
    262     \draw[arr] (1) -- (5) ;
    263     \draw[arr] (3) -- (8) ;
    264     \draw[arr] (2) -- (6) ;
    265     \draw[arr] (4) -- (7) ;
    266   \end{tikzpicture}
    267   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    268   \label{fig:clause-conting}
    269 \end{figure}
    270 \end{frame}
    271 
    272 %Clause Contingente 08 - jc
    273 \begin{frame}
    274 \begin{figure}[h!]
    275   \centering
    276   \begin{tikzpicture}[
    277       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    278       lettre/.style={
    279         on chain,
    280         draw,
    281         circle,
    282         minimum size=1cm
    283       },
    284       chiffre/.style={
    285         node distance = 0.75cm
    286       },
    287       arr/.style={
    288         ->,
    289         >=triangle 90
    290       }
    291     ]
    292     \node[lettre] (1) {$\lnot x1$} ;
    293     \node[lettre] (5) {$x2$} ;
    294     \node[lettre] (3) {$\lnot x2$} ;
    295     \node[lettre] (6) {$x3$} ;
    296     \node[lettre] (4) {$\lnot x3$} ;
    297     \node[lettre] (7) {$x4$} ;
    298     \node[lettre] (2) {$\lnot x4$} ;
    299     \node[lettre] (8) {$x1$} ;
    300     
    301     \node[chiffre, above right of=1] {1} ;
    302     \node[chiffre, below right of=3] {3} ;
    303     \node[chiffre, above left of=2]  {2} ;
    304 
    305     \draw[arr] (1) -- (5) ;
    306     \draw[arr] (3) -- (8) ;
    307     \draw[arr] (2) -- (6) ;
    308     \draw[arr] (4) -- (7) ;
    309   \end{tikzpicture}
    310   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    311   \label{fig:clause-conting}
    312 \end{figure}
    313 \end{frame}
    314 
    315 %Clause Contingente 09 - jc
    316 \begin{frame}
    317 \begin{figure}[h!]
    318   \centering
    319   \begin{tikzpicture}[
    320       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    321       lettre/.style={
    322         on chain,
    323         draw,
    324         circle,
    325         minimum size=1cm
    326       },
    327       chiffre/.style={
    328         node distance = 0.75cm
    329       },
    330       arr/.style={
    331         ->,
    332         >=triangle 90
    333       }
    334     ]
    335     \node[lettre] (1) {$\lnot x1$} ;
    336     \node[lettre] (5) {$x2$} ;
    337     \node[lettre] (3) {$\lnot x2$} ;
    338     \node[lettre] (6) {$x3$} ;
    339     \node[lettre] (4) {$\lnot x3$} ;
    340     \node[lettre] (7) {$x4$} ;
    341     \node[lettre] (2) {$\lnot x4$} ;
    342     \node[lettre] (8) {$x1$} ;
    343     
    344     \node[chiffre, above right of=1] {1} ;
    345     \node[chiffre, below right of=3] {3} ;
    346     \node[chiffre, below left of=4]  {4} ;
    347     \node[chiffre, above left of=2]  {2} ;
    348 
    349     \draw[arr] (1) -- (5) ;
    350     \draw[arr] (3) -- (8) ;
    351     \draw[arr] (2) -- (6) ;
    352     \draw[arr] (4) -- (7) ;
    353   \end{tikzpicture}
    354   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    355   \label{fig:clause-conting}
    356 \end{figure}
    357 \end{frame}
    358 
    359 %Clause Contingente 10 - jc
    360 \begin{frame}
    361 \begin{figure}[h!]
    362   \centering
    363   \begin{tikzpicture}[
    364       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    365       lettre/.style={
    366         on chain,
    367         draw,
    368         circle,
    369         minimum size=1cm
    370       },
    371       chiffre/.style={
    372         node distance = 0.75cm
    373       },
    374       arr/.style={
    375         ->,
    376         >=triangle 90
    377       }
    378     ]
    379     \node[lettre] (1) {$\lnot x1$} ;
    380     \node[lettre] (5) {$x2$} ;
    381     \node[lettre] (3) {$\lnot x2$} ;
    382     \node[lettre] (6) {$x3$} ;
    383     \node[lettre] (4) {$\lnot x3$} ;
    384     \node[lettre] (7) {$x4$} ;
    385     \node[lettre] (2) {$\lnot x4$} ;
    386     \node[lettre] (8) {$x1$} ;
    387     
    388     \node[chiffre, above right of=1] {1} ;
    389     \node[chiffre, above right of=5] {5} ;
    390     \node[chiffre, below right of=3] {3} ;
    391     \node[chiffre, below left of=4]  {4} ;
    392     \node[chiffre, above left of=2]  {2} ;
    393 
    394     \draw[arr] (1) -- (5) ;
    395     \draw[arr] (3) -- (8) ;
    396     \draw[arr] (2) -- (6) ;
    397     \draw[arr] (4) -- (7) ;
    398   \end{tikzpicture}
    399   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    400   \label{fig:clause-conting}
    401 \end{figure}
    402 \end{frame}
    403 
    404 %Clause Contingente 11 - jc
    405 \begin{frame}
    406 \begin{figure}[h!]
    407   \centering
    408   \begin{tikzpicture}[
    409       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    410       lettre/.style={
    411         on chain,
    412         draw,
    413         circle,
    414         minimum size=1cm
    415       },
    416       chiffre/.style={
    417         node distance = 0.75cm
    418       },
    419       arr/.style={
    420         ->,
    421         >=triangle 90
    422       }
    423     ]
    424     \node[lettre] (1) {$\lnot x1$} ;
    425     \node[lettre] (5) {$x2$} ;
    426     \node[lettre] (3) {$\lnot x2$} ;
    427     \node[lettre] (6) {$x3$} ;
    428     \node[lettre] (4) {$\lnot x3$} ;
    429     \node[lettre] (7) {$x4$} ;
    430     \node[lettre] (2) {$\lnot x4$} ;
    431     \node[lettre] (8) {$x1$} ;
    432     
    433     \node[chiffre, above right of=1] {1} ;
    434     \node[chiffre, above right of=5] {5} ;
    435     \node[chiffre, below right of=3] {3} ;
    436     \node[chiffre, below right of=6] {6} ;
    437     \node[chiffre, below left of=4]  {4} ;
    438     \node[chiffre, above left of=2]  {2} ;
    439 
    440     \draw[arr] (1) -- (5) ;
    441     \draw[arr] (3) -- (8) ;
    442     \draw[arr] (2) -- (6) ;
    443     \draw[arr] (4) -- (7) ;
    444   \end{tikzpicture}
    445   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    446   \label{fig:clause-conting}
    447 \end{figure}
    448 \end{frame}
    449 
    450 %Clause Contingente 12 - jc
    451 \begin{frame}
    452 \begin{figure}[h!]
    453   \centering
    454   \begin{tikzpicture}[
    455       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    456       lettre/.style={
    457         on chain,
    458         draw,
    459         circle,
    460         minimum size=1cm
    461       },
    462       chiffre/.style={
    463         node distance = 0.75cm
    464       },
    465       arr/.style={
    466         ->,
    467         >=triangle 90
    468       }
    469     ]
    470     \node[lettre] (1) {$\lnot x1$} ;
    471     \node[lettre] (5) {$x2$} ;
    472     \node[lettre] (3) {$\lnot x2$} ;
    473     \node[lettre] (6) {$x3$} ;
    474     \node[lettre] (4) {$\lnot x3$} ;
    475     \node[lettre] (7) {$x4$} ;
    476     \node[lettre] (2) {$\lnot x4$} ;
    477     \node[lettre] (8) {$x1$} ;
    478     
    479     \node[chiffre, above right of=1] {1} ;
    480     \node[chiffre, above right of=5] {5} ;
    481     \node[chiffre, below right of=3] {3} ;
    482     \node[chiffre, below right of=6] {6} ;
    483     \node[chiffre, below left of=4]  {4} ;
    484     \node[chiffre, below left of=7]  {7} ;
    485     \node[chiffre, above left of=2]  {2} ;
    486 
    487     \draw[arr] (1) -- (5) ;
    488     \draw[arr] (3) -- (8) ;
    489     \draw[arr] (2) -- (6) ;
    490     \draw[arr] (4) -- (7) ;
    491   \end{tikzpicture}
    492   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    493   \label{fig:clause-conting}
    494 \end{figure}
    495 \end{frame}
    496 
    497 %Clause Contingente 13 - jc
    498 \begin{frame}
    499 \begin{figure}[h!]
    500   \centering
    501   \begin{tikzpicture}[
    502       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    503       lettre/.style={
    504         on chain,
    505         draw,
    506         circle,
    507         minimum size=1cm
    508       },
    509       chiffre/.style={
    510         node distance = 0.75cm
    511       },
    512       arr/.style={
    513         ->,
    514         >=triangle 90
    515       }
    516     ]
    517     \node[lettre] (1) {$\lnot x1$} ;
    518     \node[lettre] (5) {$x2$} ;
    519     \node[lettre] (3) {$\lnot x2$} ;
    520     \node[lettre] (6) {$x3$} ;
    521     \node[lettre] (4) {$\lnot x3$} ;
    522     \node[lettre] (7) {$x4$} ;
    523     \node[lettre] (2) {$\lnot x4$} ;
    524     \node[lettre] (8) {$x1$} ;
    525     
    526     \node[chiffre, above right of=1] {1} ;
    527     \node[chiffre, above right of=5] {5} ;
    528     \node[chiffre, below right of=3] {3} ;
    529     \node[chiffre, below right of=6] {6} ;
    530     \node[chiffre, below left of=4]  {4} ;
    531     \node[chiffre, below left of=7]  {7} ;
    532     \node[chiffre, above left of=2]  {2} ;
    533     \node[chiffre, above left of=8]  {8} ;
    534 
    535     \draw[arr] (1) -- (5) ;
    536     \draw[arr] (3) -- (8) ;
    537     \draw[arr] (2) -- (6) ;
    538     \draw[arr] (4) -- (7) ;
    539   \end{tikzpicture}
    540   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    541   \label{fig:clause-conting}
    542 \end{figure}
    543 \end{frame}
    544 
    545 %Clause Contingente 14 - jc
    546 \begin{frame}
    547 \begin{figure}[h!]
    548   \centering
    549   \begin{tikzpicture}[
    550       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    551       lettre/.style={
    552         on chain,
    553         draw,
    554         circle,
    555         minimum size=1cm
    556       },
    557       chiffre/.style={
    558         node distance = 0.75cm
    559       },
    560       arr/.style={
    561         ->,
    562         >=triangle 90
    563       }
    564     ]
    565     \node[lettre] (1) {$\lnot x1$} ;
    566     \node[lettre] (5) {$x2$} ;
    567     \node[lettre] (3) {$\lnot x2$} ;
    568     \node[lettre] (6) {$x3$} ;
    569     \node[lettre] (4) {$\lnot x3$} ;
    570     \node[lettre] (7) {$x4$} ;
    571     \node[lettre] (2) {$\lnot x4$} ;
    572     \node[lettre] (8) {$x1$} ;
    573     
    574     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    575     
    576     \node[chiffre, above right of=1] {1} ;
    577     \node[chiffre, above right of=5] {5} ;
    578     \node[chiffre, below right of=3] {3} ;
    579     \node[chiffre, below right of=6] {6} ;
    580     \node[chiffre, below left of=4]  {4} ;
    581     \node[chiffre, below left of=7]  {7} ;
    582     \node[chiffre, above left of=2]  {2} ;
    583     \node[chiffre, above left of=8]  {8} ;
    584 
    585     \draw[arr] (1) -- (5) ;
    586     \draw[arr] (3) -- (8) ;
    587     \draw[arr] (2) -- (6) ;
    588     \draw[arr] (4) -- (7) ;
    589   \end{tikzpicture}
    590   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    591   \label{fig:clause-conting}
    592 \end{figure}
    593 \end{frame}
    594 
    595 %Clause Contingente 15 - jc
    596 \begin{frame}
    597 \begin{figure}[h!]
    598   \centering
    599   \begin{tikzpicture}[
    600       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    601       lettre/.style={
    602         on chain,
    603         draw,
    604         circle,
    605         minimum size=1cm
    606       },
    607       chiffre/.style={
    608         node distance = 0.75cm
    609       },
    610       arr/.style={
    611         ->,
    612         >=triangle 90
    613       }
    614     ]
    615     \node[lettre] (1) {$\lnot x1$} ;
    616     \node[lettre] (5) {$x2$} ;
    617     \node[lettre] (3) {$\lnot x2$} ;
    618     \node[lettre] (6) {$x3$} ;
    619     \node[lettre] (4) {$\lnot x3$} ;
    620     \node[lettre] (7) {$x4$} ;
    621     \node[lettre] (2) {$\lnot x4$} ;
    622     \node[lettre] (8) {$x1$} ;
    623     
    624     \node[right of=1] {\textcolor{red}{faux}} ;
    625     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    626     
    627     \node[chiffre, above right of=1] {1} ;
    628     \node[chiffre, above right of=5] {5} ;
    629     \node[chiffre, below right of=3] {3} ;
    630     \node[chiffre, below right of=6] {6} ;
    631     \node[chiffre, below left of=4]  {4} ;
    632     \node[chiffre, below left of=7]  {7} ;
    633     \node[chiffre, above left of=2]  {2} ;
    634     \node[chiffre, above left of=8]  {8} ;
    635 
    636     \draw[arr] (1) -- (5) ;
    637     \draw[arr] (3) -- (8) ;
    638     \draw[arr] (2) -- (6) ;
    639     \draw[arr] (4) -- (7) ;
    640   \end{tikzpicture}
    641   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    642   \label{fig:clause-conting}
    643 \end{figure}
    644 \end{frame}
    645 
    646 %Clause Contingente 16 - jc
    647 \begin{frame}
    648 \begin{figure}[h!]
    649   \centering
    650   \begin{tikzpicture}[
    651       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    652       lettre/.style={
    653         on chain,
    654         draw,
    655         circle,
    656         minimum size=1cm
    657       },
    658       chiffre/.style={
    659         node distance = 0.75cm
    660       },
    661       arr/.style={
    662         ->,
    663         >=triangle 90
    664       }
    665     ]
    666     \node[lettre] (1) {$\lnot x1$} ;
    667     \node[lettre] (5) {$x2$} ;
    668     \node[lettre] (3) {$\lnot x2$} ;
    669     \node[lettre] (6) {$x3$} ;
    670     \node[lettre] (4) {$\lnot x3$} ;
    671     \node[lettre] (7) {$x4$} ;
    672     \node[lettre] (2) {$\lnot x4$} ;
    673     \node[lettre] (8) {$x1$} ;
    674     
    675     \node[right of=1] {\textcolor{red}{faux}} ;
    676     \node[left  of=7] {\textcolor{green!75!black}{vrai}} ;
    677     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    678     
    679     \node[chiffre, above right of=1] {1} ;
    680     \node[chiffre, above right of=5] {5} ;
    681     \node[chiffre, below right of=3] {3} ;
    682     \node[chiffre, below right of=6] {6} ;
    683     \node[chiffre, below left of=4]  {4} ;
    684     \node[chiffre, below left of=7]  {7} ;
    685     \node[chiffre, above left of=2]  {2} ;
    686     \node[chiffre, above left of=8]  {8} ;
    687 
    688     \draw[arr] (1) -- (5) ;
    689     \draw[arr] (3) -- (8) ;
    690     \draw[arr] (2) -- (6) ;
    691     \draw[arr] (4) -- (7) ;
    692   \end{tikzpicture}
    693   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    694   \label{fig:clause-conting}
    695 \end{figure}
    696 \end{frame}
    697 
    698 %Clause Contingente 17 - jc
    699 \begin{frame}
    700 \begin{figure}[h!]
    701   \centering
    702   \begin{tikzpicture}[
    703       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    704       lettre/.style={
    705         on chain,
    706         draw,
    707         circle,
    708         minimum size=1cm
    709       },
    710       chiffre/.style={
    711         node distance = 0.75cm
    712       },
    713       arr/.style={
    714         ->,
    715         >=triangle 90
    716       }
    717     ]
    718     \node[lettre] (1) {$\lnot x1$} ;
    719     \node[lettre] (5) {$x2$} ;
    720     \node[lettre] (3) {$\lnot x2$} ;
    721     \node[lettre] (6) {$x3$} ;
    722     \node[lettre] (4) {$\lnot x3$} ;
    723     \node[lettre] (7) {$x4$} ;
    724     \node[lettre] (2) {$\lnot x4$} ;
    725     \node[lettre] (8) {$x1$} ;
    726     
    727     \node[right of=1] {\textcolor{red}{faux}} ;
    728     \node[left  of=7] {\textcolor{green!75!black}{vrai}} ;
    729     \node[left  of=2] {\textcolor{red}{faux}} ;
    730     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    731     
    732     \node[chiffre, above right of=1] {1} ;
    733     \node[chiffre, above right of=5] {5} ;
    734     \node[chiffre, below right of=3] {3} ;
    735     \node[chiffre, below right of=6] {6} ;
    736     \node[chiffre, below left of=4]  {4} ;
    737     \node[chiffre, below left of=7]  {7} ;
    738     \node[chiffre, above left of=2]  {2} ;
    739     \node[chiffre, above left of=8]  {8} ;
    740 
    741     \draw[arr] (1) -- (5) ;
    742     \draw[arr] (3) -- (8) ;
    743     \draw[arr] (2) -- (6) ;
    744     \draw[arr] (4) -- (7) ;
    745   \end{tikzpicture}
    746   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    747   \label{fig:clause-conting}
    748 \end{figure}
    749 \end{frame}
    750 
    751 %Clause Contingente 18 - jc
    752 \begin{frame}
    753 \begin{figure}[h!]
    754   \centering
    755   \begin{tikzpicture}[
    756       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    757       lettre/.style={
    758         on chain,
    759         draw,
    760         circle,
    761         minimum size=1cm
    762       },
    763       chiffre/.style={
    764         node distance = 0.75cm
    765       },
    766       arr/.style={
    767         ->,
    768         >=triangle 90
    769       }
    770     ]
    771     \node[lettre] (1) {$\lnot x1$} ;
    772     \node[lettre] (5) {$x2$} ;
    773     \node[lettre] (3) {$\lnot x2$} ;
    774     \node[lettre] (6) {$x3$} ;
    775     \node[lettre] (4) {$\lnot x3$} ;
    776     \node[lettre] (7) {$x4$} ;
    777     \node[lettre] (2) {$\lnot x4$} ;
    778     \node[lettre] (8) {$x1$} ;
    779     
    780     \node[right of=1] {\textcolor{red}{faux}} ;
    781     \node[right of=6] {\textcolor{green!75!black}{vrai}} ;
    782     \node[left  of=7] {\textcolor{green!75!black}{vrai}} ;
    783     \node[left  of=2] {\textcolor{red}{faux}} ;
    784     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    785     
    786     \node[chiffre, above right of=1] {1} ;
    787     \node[chiffre, above right of=5] {5} ;
    788     \node[chiffre, below right of=3] {3} ;
    789     \node[chiffre, below right of=6] {6} ;
    790     \node[chiffre, below left of=4]  {4} ;
    791     \node[chiffre, below left of=7]  {7} ;
    792     \node[chiffre, above left of=2]  {2} ;
    793     \node[chiffre, above left of=8]  {8} ;
    794 
    795     \draw[arr] (1) -- (5) ;
    796     \draw[arr] (3) -- (8) ;
    797     \draw[arr] (2) -- (6) ;
    798     \draw[arr] (4) -- (7) ;
    799   \end{tikzpicture}
    800   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    801   \label{fig:clause-conting}
    802 \end{figure}
    803 \end{frame}
    804 
    805 %Clause Contingente 19 - jc
    806 \begin{frame}
    807 \begin{figure}[h!]
    808   \centering
    809   \begin{tikzpicture}[
    810       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    811       lettre/.style={
    812         on chain,
    813         draw,
    814         circle,
    815         minimum size=1cm
    816       },
    817       chiffre/.style={
    818         node distance = 0.75cm
    819       },
    820       arr/.style={
    821         ->,
    822         >=triangle 90
    823       }
    824     ]
    825     \node[lettre] (1) {$\lnot x1$} ;
    826     \node[lettre] (5) {$x2$} ;
    827     \node[lettre] (3) {$\lnot x2$} ;
    828     \node[lettre] (6) {$x3$} ;
    829     \node[lettre] (4) {$\lnot x3$} ;
    830     \node[lettre] (7) {$x4$} ;
    831     \node[lettre] (2) {$\lnot x4$} ;
    832     \node[lettre] (8) {$x1$} ;
    833     
    834     \node[right of=1] {\textcolor{red}{faux}} ;
    835     \node[right of=6] {\textcolor{green!75!black}{vrai}} ;
    836     \node[left  of=4] {\textcolor{red}{faux}} ;
    837     \node[left  of=7] {\textcolor{green!75!black}{vrai}} ;
    838     \node[left  of=2] {\textcolor{red}{faux}} ;
    839     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    840     
    841     \node[chiffre, above right of=1] {1} ;
    842     \node[chiffre, above right of=5] {5} ;
    843     \node[chiffre, below right of=3] {3} ;
    844     \node[chiffre, below right of=6] {6} ;
    845     \node[chiffre, below left of=4]  {4} ;
    846     \node[chiffre, below left of=7]  {7} ;
    847     \node[chiffre, above left of=2]  {2} ;
    848     \node[chiffre, above left of=8]  {8} ;
    849 
    850     \draw[arr] (1) -- (5) ;
    851     \draw[arr] (3) -- (8) ;
    852     \draw[arr] (2) -- (6) ;
    853     \draw[arr] (4) -- (7) ;
    854   \end{tikzpicture}
    855   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    856   \label{fig:clause-conting}
    857 \end{figure}
    858 \end{frame}
    859 
    860 %Clause Contingente 20 - jc
    861 \begin{frame}
    862 \begin{figure}[h!]
    863   \centering
    864   \begin{tikzpicture}[
    865       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    866       lettre/.style={
    867         on chain,
    868         draw,
    869         circle,
    870         minimum size=1cm
    871       },
    872       chiffre/.style={
    873         node distance = 0.75cm
    874       },
    875       arr/.style={
    876         ->,
    877         >=triangle 90
    878       }
    879     ]
    880     \node[lettre] (1) {$\lnot x1$} ;
    881     \node[lettre] (5) {$x2$} ;
    882     \node[lettre] (3) {$\lnot x2$} ;
    883     \node[lettre] (6) {$x3$} ;
    884     \node[lettre] (4) {$\lnot x3$} ;
    885     \node[lettre] (7) {$x4$} ;
    886     \node[lettre] (2) {$\lnot x4$} ;
    887     \node[lettre] (8) {$x1$} ;
    888     
    889     \node[right of=1] {\textcolor{red}{faux}} ;
    890     \node[right of=5] {\textcolor{green!75!black}{vrai}} ;
    891     \node[right of=6] {\textcolor{green!75!black}{vrai}} ;
    892     \node[left  of=4] {\textcolor{red}{faux}} ;
    893     \node[left  of=7] {\textcolor{green!75!black}{vrai}} ;
    894     \node[left  of=2] {\textcolor{red}{faux}} ;
    895     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    896     
    897     \node[chiffre, above right of=1] {1} ;
    898     \node[chiffre, above right of=5] {5} ;
    899     \node[chiffre, below right of=3] {3} ;
    900     \node[chiffre, below right of=6] {6} ;
    901     \node[chiffre, below left of=4]  {4} ;
    902     \node[chiffre, below left of=7]  {7} ;
    903     \node[chiffre, above left of=2]  {2} ;
    904     \node[chiffre, above left of=8]  {8} ;
    905 
    906     \draw[arr] (1) -- (5) ;
    907     \draw[arr] (3) -- (8) ;
    908     \draw[arr] (2) -- (6) ;
    909     \draw[arr] (4) -- (7) ;
    910   \end{tikzpicture}
    911   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    912   \label{fig:clause-conting}
    913 \end{figure}
    914 \end{frame}
    915 
    916 %Clause Contingente 21 - jc
    917 \begin{frame}
    918 \begin{figure}[h!]
    919   \centering
    920   \begin{tikzpicture}[
    921       start chain=circle placed {at=(\tikzchaincount*-45+22.5+90:2.5)},
    922       lettre/.style={
    923         on chain,
    924         draw,
    925         circle,
    926         minimum size=1cm
    927       },
    928       chiffre/.style={
    929         node distance = 0.75cm
    930       },
    931       arr/.style={
    932         ->,
    933         >=triangle 90
    934       }
    935     ]
    936     \node[lettre] (1) {$\lnot x1$} ;
    937     \node[lettre] (5) {$x2$} ;
    938     \node[lettre] (3) {$\lnot x2$} ;
    939     \node[lettre] (6) {$x3$} ;
    940     \node[lettre] (4) {$\lnot x3$} ;
    941     \node[lettre] (7) {$x4$} ;
    942     \node[lettre] (2) {$\lnot x4$} ;
    943     \node[lettre] (8) {$x1$} ;
    944     
    945     \node[right of=1] {\textcolor{red}{faux}} ;
    946     \node[right of=5] {\textcolor{green!75!black}{vrai}} ;
    947     \node[right of=3] {\textcolor{red}{faux}} ;
    948     \node[right of=6] {\textcolor{green!75!black}{vrai}} ;
    949     \node[left  of=4] {\textcolor{red}{faux}} ;
    950     \node[left  of=7] {\textcolor{green!75!black}{vrai}} ;
    951     \node[left  of=2] {\textcolor{red}{faux}} ;
    952     \node[left  of=8] {\textcolor{green!75!black}{vrai}} ;
    953     
    954     \node[chiffre, above right of=1] {1} ;
    955     \node[chiffre, above right of=5] {5} ;
    956     \node[chiffre, below right of=3] {3} ;
    957     \node[chiffre, below right of=6] {6} ;
    958     \node[chiffre, below left of=4]  {4} ;
    959     \node[chiffre, below left of=7]  {7} ;
    960     \node[chiffre, above left of=2]  {2} ;
    961     \node[chiffre, above left of=8]  {8} ;
    962 
    963     \draw[arr] (1) -- (5) ;
    964     \draw[arr] (3) -- (8) ;
    965     \draw[arr] (2) -- (6) ;
    966     \draw[arr] (4) -- (7) ;
    967   \end{tikzpicture}
    968   \caption{Clause contingente : $(x_{1} \vee x_{2}) \wedge (x_{3} \vee x_{4})$}
    969   \label{fig:clause-conting}
    970 \end{figure}
    971 \end{frame}
    972 
    973 %Clause Valide 01 - jc
    974 \begin{frame}
    975 \begin{figure}[h!]
    976   \centering
    977   \begin{tikzpicture}[
    978       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
    979       lettre/.style={
    980         on chain,
    981         draw,
    982         circle,
    983         minimum size=1cm
    984       },
    985       chiffre/.style={
    986         node distance = 0.75cm
    987       },
    988       arr/.style={
    989         ->,
    990         >=triangle 90
    991       }
    992     ]
    993     \node[lettre] (1) {$\lnot x1$} ;
    994     \node[lettre] (2) {$x1$}  ;
    995     \node[lettre] (3) {$\lnot x2$} ;
    996     \node[lettre] (4) {$x2$}  ;
    997 
    998   \end{tikzpicture}
    999   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1000   \label{fig:clause-valide}
   1001 \end{figure}
   1002 \end{frame}
   1003 
   1004 %Clause Valide 02 - jc
   1005 \begin{frame}
   1006 \begin{figure}[h!]
   1007   \centering
   1008   \begin{tikzpicture}[
   1009       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1010       lettre/.style={
   1011         on chain,
   1012         draw,
   1013         circle,
   1014         minimum size=1cm
   1015       },
   1016       chiffre/.style={
   1017         node distance = 0.75cm
   1018       },
   1019       arr/.style={
   1020         ->,
   1021         >=triangle 90
   1022       }
   1023     ]
   1024     \node[lettre] (1) {$\lnot x1$} ;
   1025     \node[lettre] (2) {$x1$}  ;
   1026     \node[lettre] (3) {$\lnot x2$} ;
   1027     \node[lettre] (4) {$x2$}  ;
   1028 
   1029 	\path
   1030        (1) edge[loop above] (1) ;
   1031   \end{tikzpicture}
   1032   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1033   \label{fig:clause-valide}
   1034 \end{figure}
   1035 \end{frame}
   1036 
   1037 
   1038 %Clause Valide 03 - jc
   1039 \begin{frame}
   1040 \begin{figure}[h!]
   1041   \centering
   1042   \begin{tikzpicture}[
   1043       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1044       lettre/.style={
   1045         on chain,
   1046         draw,
   1047         circle,
   1048         minimum size=1cm
   1049       },
   1050       chiffre/.style={
   1051         node distance = 0.75cm
   1052       },
   1053       arr/.style={
   1054         ->,
   1055         >=triangle 90
   1056       }
   1057     ]
   1058     \node[lettre] (1) {$\lnot x1$} ;
   1059     \node[lettre] (2) {$x1$}  ;
   1060     \node[lettre] (3) {$\lnot x2$} ;
   1061     \node[lettre] (4) {$x2$}  ;
   1062 
   1063 	\path
   1064        (1) edge[loop above] (1)
   1065        (2) edge[loop above]  (2) ;
   1066   \end{tikzpicture}
   1067   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1068   \label{fig:clause-valide}
   1069 \end{figure}
   1070 \end{frame}
   1071 
   1072 
   1073 %Clause Valide 04 - jc
   1074 \begin{frame}
   1075 \begin{figure}[h!]
   1076   \centering
   1077   \begin{tikzpicture}[
   1078       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1079       lettre/.style={
   1080         on chain,
   1081         draw,
   1082         circle,
   1083         minimum size=1cm
   1084       },
   1085       chiffre/.style={
   1086         node distance = 0.75cm
   1087       },
   1088       arr/.style={
   1089         ->,
   1090         >=triangle 90
   1091       }
   1092     ]
   1093     \node[lettre] (1) {$\lnot x1$} ;
   1094     \node[lettre] (2) {$x1$}  ;
   1095     \node[lettre] (3) {$\lnot x2$} ;
   1096     \node[lettre] (4) {$x2$}  ;
   1097 
   1098 	\path
   1099        (1) edge[loop above] (1)
   1100        (2) edge[loop above]  (2)
   1101        (3) edge[loop below] (3) ;
   1102   \end{tikzpicture}
   1103   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1104   \label{fig:clause-valide}
   1105 \end{figure}
   1106 \end{frame}
   1107 
   1108 
   1109 %Clause Valide 05 - jc
   1110 \begin{frame}
   1111 \begin{figure}[h!]
   1112   \centering
   1113   \begin{tikzpicture}[
   1114       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1115       lettre/.style={
   1116         on chain,
   1117         draw,
   1118         circle,
   1119         minimum size=1cm
   1120       },
   1121       chiffre/.style={
   1122         node distance = 0.75cm
   1123       },
   1124       arr/.style={
   1125         ->,
   1126         >=triangle 90
   1127       }
   1128     ]
   1129     \node[lettre] (1) {$\lnot x1$} ;
   1130     \node[lettre] (2) {$x1$}  ;
   1131     \node[lettre] (3) {$\lnot x2$} ;
   1132     \node[lettre] (4) {$x2$}  ;
   1133 
   1134 	\path
   1135        (1) edge[loop above] (1)
   1136        (2) edge[loop above]  (2)
   1137        (3) edge[loop below] (3)
   1138        (4) edge[loop above] (4) ;
   1139   \end{tikzpicture}
   1140   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1141   \label{fig:clause-valide}
   1142 \end{figure}
   1143 \end{frame}
   1144 
   1145 
   1146 %Clause Valide 06 - jc
   1147 \begin{frame}
   1148 \begin{figure}[h!]
   1149   \centering
   1150   \begin{tikzpicture}[
   1151       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1152       lettre/.style={
   1153         on chain,
   1154         draw,
   1155         circle,
   1156         minimum size=1cm
   1157       },
   1158       chiffre/.style={
   1159         node distance = 0.75cm
   1160       },
   1161       arr/.style={
   1162         ->,
   1163         >=triangle 90
   1164       }
   1165     ]
   1166     \node[lettre] (1) {$\lnot x1$} ;
   1167     \node[lettre] (2) {$x1$}  ;
   1168     \node[lettre] (3) {$\lnot x2$} ;
   1169     \node[lettre] (4) {$x2$}  ;
   1170     
   1171     \node[chiffre, above right of=1] {1} ;
   1172 
   1173 	\path
   1174        (1) edge[loop above] (1)
   1175        (2) edge[loop above]  (2)
   1176        (3) edge[loop below] (3)
   1177        (4) edge[loop above] (4) ;
   1178   \end{tikzpicture}
   1179   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1180   \label{fig:clause-valide}
   1181 \end{figure}
   1182 \end{frame}
   1183 
   1184 
   1185 %Clause Valide 07 - jc
   1186 \begin{frame}
   1187 \begin{figure}[h!]
   1188   \centering
   1189   \begin{tikzpicture}[
   1190       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1191       lettre/.style={
   1192         on chain,
   1193         draw,
   1194         circle,
   1195         minimum size=1cm
   1196       },
   1197       chiffre/.style={
   1198         node distance = 0.75cm
   1199       },
   1200       arr/.style={
   1201         ->,
   1202         >=triangle 90
   1203       }
   1204     ]
   1205     \node[lettre] (1) {$\lnot x1$} ;
   1206     \node[lettre] (2) {$x1$}  ;
   1207     \node[lettre] (3) {$\lnot x2$} ;
   1208     \node[lettre] (4) {$x2$}  ;
   1209     
   1210     \node[chiffre, above right of=1] {1} ;
   1211     \node[chiffre, below right of=2] {2} ;
   1212 
   1213 	\path
   1214        (1) edge[loop above] (1)
   1215        (2) edge[loop above]  (2)
   1216        (3) edge[loop below] (3)
   1217        (4) edge[loop above] (4) ;
   1218   \end{tikzpicture}
   1219   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1220   \label{fig:clause-valide}
   1221 \end{figure}
   1222 \end{frame}
   1223 
   1224 
   1225 
   1226 
   1227 %Clause Valide 08 - jc
   1228 \begin{frame}
   1229 \begin{figure}[h!]
   1230   \centering
   1231   \begin{tikzpicture}[
   1232       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1233       lettre/.style={
   1234         on chain,
   1235         draw,
   1236         circle,
   1237         minimum size=1cm
   1238       },
   1239       chiffre/.style={
   1240         node distance = 0.75cm
   1241       },
   1242       arr/.style={
   1243         ->,
   1244         >=triangle 90
   1245       }
   1246     ]
   1247     \node[lettre] (1) {$\lnot x1$} ;
   1248     \node[lettre] (2) {$x1$}  ;
   1249     \node[lettre] (3) {$\lnot x2$} ;
   1250     \node[lettre] (4) {$x2$}  ;
   1251     
   1252     \node[chiffre, above right of=1] {1} ;
   1253     \node[chiffre, below right of=2] {2} ;
   1254     \node[chiffre, below right of=3]  {3} ;
   1255 
   1256 	\path
   1257        (1) edge[loop above] (1)
   1258        (2) edge[loop above]  (2)
   1259        (3) edge[loop below] (3)
   1260        (4) edge[loop above] (4) ;
   1261   \end{tikzpicture}
   1262   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1263   \label{fig:clause-valide}
   1264 \end{figure}
   1265 \end{frame}
   1266 
   1267 %Clause Valide 09 - jc
   1268 \begin{frame}
   1269 \begin{figure}[h!]
   1270   \centering
   1271   \begin{tikzpicture}[
   1272       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1273       lettre/.style={
   1274         on chain,
   1275         draw,
   1276         circle,
   1277         minimum size=1cm
   1278       },
   1279       chiffre/.style={
   1280         node distance = 0.75cm
   1281       },
   1282       arr/.style={
   1283         ->,
   1284         >=triangle 90
   1285       }
   1286     ]
   1287     \node[lettre] (1) {$\lnot x1$} ;
   1288     \node[lettre] (2) {$x1$}  ;
   1289     \node[lettre] (3) {$\lnot x2$} ;
   1290     \node[lettre] (4) {$x2$}  ;
   1291     
   1292     \node[chiffre, above right of=1] {1} ;
   1293     \node[chiffre, below right of=2] {2} ;
   1294     \node[chiffre, below right of=3]  {3} ;
   1295     \node[chiffre, below left of=4]  {4} ;
   1296 
   1297 	\path
   1298        (1) edge[loop above] (1)
   1299        (2) edge[loop above]  (2)
   1300        (3) edge[loop below] (3)
   1301        (4) edge[loop above] (4) ;
   1302   \end{tikzpicture}
   1303   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1304   \label{fig:clause-valide}
   1305 \end{figure}
   1306 \end{frame}
   1307 
   1308 
   1309 %Clause Valide 10 - jc
   1310 \begin{frame}
   1311 \begin{figure}[h!]
   1312   \centering
   1313   \begin{tikzpicture}[
   1314       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1315       lettre/.style={
   1316         on chain,
   1317         draw,
   1318         circle,
   1319         minimum size=1cm
   1320       },
   1321       chiffre/.style={
   1322         node distance = 0.75cm
   1323       },
   1324       arr/.style={
   1325         ->,
   1326         >=triangle 90
   1327       }
   1328     ]
   1329     \node[lettre] (1) {$\lnot x1$} ;
   1330     \node[lettre] (2) {$x1$}  ;
   1331     \node[lettre] (3) {$\lnot x2$} ;
   1332     \node[lettre] (4) {$x2$}  ;
   1333     
   1334     \node[left  of=4] {\textcolor{green!75!black}{vrai}} ;
   1335     
   1336     \node[chiffre, above right of=1] {1} ;
   1337     \node[chiffre, below right of=2] {2} ;
   1338     \node[chiffre, below right of=3]  {3} ;
   1339     \node[chiffre, below left of=4]  {4} ;
   1340 
   1341 	\path
   1342        (1) edge[loop above] (1)
   1343        (2) edge[loop above]  (2)
   1344        (3) edge[loop below] (3)
   1345        (4) edge[loop above] (4) ;
   1346   \end{tikzpicture}
   1347   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1348   \label{fig:clause-valide}
   1349 \end{figure}
   1350 \end{frame}
   1351 
   1352 
   1353 %Clause Valide 11 - jc
   1354 \begin{frame}
   1355 \begin{figure}[h!]
   1356   \centering
   1357   \begin{tikzpicture}[
   1358       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1359       lettre/.style={
   1360         on chain,
   1361         draw,
   1362         circle,
   1363         minimum size=1cm
   1364       },
   1365       chiffre/.style={
   1366         node distance = 0.75cm
   1367       },
   1368       arr/.style={
   1369         ->,
   1370         >=triangle 90
   1371       }
   1372     ]
   1373     \node[lettre] (1) {$\lnot x1$} ;
   1374     \node[lettre] (2) {$x1$}  ;
   1375     \node[lettre] (3) {$\lnot x2$} ;
   1376     \node[lettre] (4) {$x2$}  ;
   1377    
   1378     \node[right of=3] {\textcolor{red}{faux}} ;
   1379     \node[left  of=4] {\textcolor{green!75!black}{vrai}} ;
   1380     
   1381     \node[chiffre, above right of=1] {1} ;
   1382     \node[chiffre, below right of=2] {2} ;
   1383     \node[chiffre, below right of=3]  {3} ;
   1384     \node[chiffre, below left of=4]  {4} ;
   1385 
   1386 	\path
   1387        (1) edge[loop above] (1)
   1388        (2) edge[loop above]  (2)
   1389        (3) edge[loop below] (3)
   1390        (4) edge[loop above] (4) ;
   1391   \end{tikzpicture}
   1392   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1393   \label{fig:clause-valide}
   1394 \end{figure}
   1395 \end{frame}
   1396 
   1397 
   1398 %Clause Valide 12 - jc
   1399 \begin{frame}
   1400 \begin{figure}[h!]
   1401   \centering
   1402   \begin{tikzpicture}[
   1403       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1404       lettre/.style={
   1405         on chain,
   1406         draw,
   1407         circle,
   1408         minimum size=1cm
   1409       },
   1410       chiffre/.style={
   1411         node distance = 0.75cm
   1412       },
   1413       arr/.style={
   1414         ->,
   1415         >=triangle 90
   1416       }
   1417     ]
   1418     \node[lettre] (1) {$\lnot x1$} ;
   1419     \node[lettre] (2) {$x1$}  ;
   1420     \node[lettre] (3) {$\lnot x2$} ;
   1421     \node[lettre] (4) {$x2$}  ;
   1422     
   1423     \node[right of=2] {\textcolor{green!75!black}{vrai}};
   1424     \node[right of=3] {\textcolor{red}{faux}} ;
   1425     \node[left  of=4] {\textcolor{green!75!black}{vrai}} ;
   1426     
   1427     \node[chiffre, above right of=1] {1} ;
   1428     \node[chiffre, below right of=2] {2} ;
   1429     \node[chiffre, below right of=3]  {3} ;
   1430     \node[chiffre, below left of=4]  {4} ;
   1431 
   1432 	\path
   1433        (1) edge[loop above] (1)
   1434        (2) edge[loop above]  (2)
   1435        (3) edge[loop below] (3)
   1436        (4) edge[loop above] (4) ;
   1437   \end{tikzpicture}
   1438   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1439   \label{fig:clause-valide}
   1440 \end{figure}
   1441 \end{frame}
   1442 
   1443 
   1444 %Clause Valide 13 - jc
   1445 \begin{frame}
   1446 \begin{figure}[h!]
   1447   \centering
   1448   \begin{tikzpicture}[
   1449       start chain=circle placed {at=(\tikzchaincount*-90+180:1.6)},
   1450       lettre/.style={
   1451         on chain,
   1452         draw,
   1453         circle,
   1454         minimum size=1cm
   1455       },
   1456       chiffre/.style={
   1457         node distance = 0.75cm
   1458       },
   1459       arr/.style={
   1460         ->,
   1461         >=triangle 90
   1462       }
   1463     ]
   1464     \node[lettre] (1) {$\lnot x1$} ;
   1465     \node[lettre] (2) {$x1$}  ;
   1466     \node[lettre] (3) {$\lnot x2$} ;
   1467     \node[lettre] (4) {$x2$}  ;
   1468     
   1469     \node[right of=1] {\textcolor{red}{faux}}  ;
   1470     \node[right of=2] {\textcolor{green!75!black}{vrai}};
   1471     \node[right of=3] {\textcolor{red}{faux}} ;
   1472     \node[left  of=4] {\textcolor{green!75!black}{vrai}} ;
   1473     
   1474     \node[chiffre, above right of=1] {1} ;
   1475     \node[chiffre, below right of=2] {2} ;
   1476     \node[chiffre, below right of=3]  {3} ;
   1477     \node[chiffre, below left of=4]  {4} ;
   1478 
   1479 	\path
   1480        (1) edge[loop above] (1)
   1481        (2) edge[loop above]  (2)
   1482        (3) edge[loop below] (3)
   1483        (4) edge[loop above] (4) ;
   1484   \end{tikzpicture}
   1485   \caption{Clause valide :  $(x_{1} \vee \neg x_{1}) \wedge (x_{2} \vee \neg x_{2})$}
   1486   \label{fig:clause-valide}
   1487 \end{figure}
   1488 \end{frame}
   1489 
   1490 % clause insatisfiable 01 - jc
   1491 \begin{frame}
   1492 \begin{figure}[h!]
   1493   \centering
   1494   \begin{tikzpicture}[
   1495       node distance=2.5cm,
   1496       lettre/.style={
   1497         draw,
   1498         circle,
   1499         minimum size=1cm
   1500       }
   1501     ]
   1502     \node[lettre] (nx1) {$\lnot x_1$} ;
   1503     \node[lettre, below of=nx1] (x1) {$x_1$} ;
   1504     \node[coordinate,xshift=0.1cm] (x1r) at (x1.north) {};
   1505     \node[coordinate,xshift=-0.1cm] (x1l) at (x1.north) {};
   1506     \node[coordinate,xshift=0.1cm] (nx1r) at (nx1.south) {};
   1507     \node[coordinate,xshift=-0.1cm] (nx1l) at (nx1.south) {};
   1508 
   1509   \end{tikzpicture}
   1510   \caption{Clause insatisfiable : $(x_{1} \vee x_{1}) \wedge (\neg x_{1} \vee \neg x_{1})$}
   1511   \label{fig:clause-insat}
   1512 \end{figure}
   1513 \end{frame}
   1514 
   1515 % clause insatisfiable 02 - jc
   1516 \begin{frame}
   1517 \begin{figure}[h!]
   1518   \centering
   1519   \begin{tikzpicture}[
   1520       node distance=2.5cm,
   1521       lettre/.style={
   1522         draw,
   1523         circle,
   1524         minimum size=1cm
   1525       }
   1526     ]
   1527     \node[lettre] (nx1) {$\lnot x_1$} ;
   1528     \node[lettre, below of=nx1] (x1) {$x_1$} ;
   1529     \node[coordinate,xshift=0.1cm] (x1r) at (x1.north) {};
   1530     \node[coordinate,xshift=-0.1cm] (x1l) at (x1.north) {};
   1531     \node[coordinate,xshift=0.1cm] (nx1r) at (nx1.south) {};
   1532     \node[coordinate,xshift=-0.1cm] (nx1l) at (nx1.south) {};
   1533     \draw[->] (nx1l) -- (x1l);
   1534 
   1535   \end{tikzpicture}
   1536   \caption{Clause insatisfiable : $(x_{1} \vee x_{1}) \wedge (\neg x_{1} \vee \neg x_{1})$}
   1537   \label{fig:clause-insat}
   1538 \end{figure}
   1539 \end{frame}
   1540 
   1541 % clause insatisfiable 03 - jc
   1542 \begin{frame}
   1543 \begin{figure}[h!]
   1544   \centering
   1545   \begin{tikzpicture}[
   1546       node distance=2.5cm,
   1547       lettre/.style={
   1548         draw,
   1549         circle,
   1550         minimum size=1cm
   1551       }
   1552     ]
   1553     \node[lettre] (nx1) {$\lnot x_1$} ;
   1554     \node[lettre, below of=nx1] (x1) {$x_1$} ;
   1555     \node[coordinate,xshift=0.1cm] (x1r) at (x1.north) {};
   1556     \node[coordinate,xshift=-0.1cm] (x1l) at (x1.north) {};
   1557     \node[coordinate,xshift=0.1cm] (nx1r) at (nx1.south) {};
   1558     \node[coordinate,xshift=-0.1cm] (nx1l) at (nx1.south) {};
   1559     \draw[->] (x1r) -- (nx1r);
   1560     \draw[->] (nx1l) -- (x1l);
   1561   \end{tikzpicture}
   1562   \caption{Clause insatisfiable : $(x_{1} \vee x_{1}) \wedge (\neg x_{1} \vee \neg x_{1})$}
   1563   \label{fig:clause-insat}
   1564 \end{figure}
   1565 \end{frame}
   1566 
   1567 % clause insatisfiable 04 - jc
   1568 \begin{frame}
   1569 \begin{figure}[h!]
   1570   \centering
   1571   \begin{tikzpicture}[
   1572       node distance=2.5cm,
   1573       lettre/.style={
   1574         draw,
   1575         circle,
   1576         minimum size=1cm
   1577       }
   1578     ]
   1579     \node[lettre] (nx1) {$\lnot x_1$} ;
   1580     \node[lettre, below of=nx1] (x1) {$x_1$} ;
   1581     \node[coordinate,xshift=0.1cm] (x1r) at (x1.north) {};
   1582     \node[coordinate,xshift=-0.1cm] (x1l) at (x1.north) {};
   1583     \node[coordinate,xshift=0.1cm] (nx1r) at (nx1.south) {};
   1584     \node[coordinate,xshift=-0.1cm] (nx1l) at (nx1.south) {};
   1585     \draw[->] (x1r) -- (nx1r);
   1586     \draw[->] (nx1l) -- (x1l);
   1587     \path
   1588       (x1) edge[loop below] (x1)
   1589       (nx1) edge[loop above] (nx1) ;
   1590   \end{tikzpicture}
   1591   \caption{Clause insatisfiable : $(x_{1} \vee x_{1}) \wedge (\neg x_{1} \vee \neg x_{1})$}
   1592   \label{fig:clause-insat}
   1593 \end{figure}
   1594 \end{frame}