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com March 27,

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56 G = (V, E)?è ? , V ?êè , E?V ? ? ;

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56 G = (V, E)?è ? , V ?êè , E?V ? ? ;

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2013 5 /

56 G = (V, E)?è ? , V ?êè , E?V ? ? ;

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2013 5 /

56 G = (V, E)?è ? , V ?êè , E?V ? ? ;

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2013 5 /

56 G = (V, E)?è ? , V ?êè , E?V ? ? ;

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2013 5 /

56 G = (V, E)?è ? , V ?êè , E?V ? ? ;

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2013 5 /

56 (?) ÷(Walk) ÷);

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2013 6 /

56 (?) ÷(Walk) ÷);

?(Trail) ?(Path) (Cycle, ù?(Euler, 1736): v∈V (G) d(v) = 2|E(G)|. ó?: ? ? í (chenxiongda@gmail.com)March 27,

2013 6 /

56 (?) ÷(Walk) ÷);

?(Trail) ?(Path) (Cycle, ù?(Euler, 1736): v∈V (G) d(v) = 2|E(G)|. ó?: ? ? í (chenxiongda@gmail.com)March 27,

2013 6 /

56 (?) ÷(Walk) ÷);

?(Trail) ?(Path) (Cycle, ù?(Euler, 1736): v∈V (G) d(v) = 2|E(G)|. ó?: ? ? í (chenxiongda@gmail.com)March 27,

2013 6 /

56 (?) ÷(Walk) ÷);

?(Trail) ?(Path) (Cycle, ù?(Euler, 1736): v∈V (G) d(v) = 2|E(G)|. ó?: ? ? í (chenxiongda@gmail.com)March 27,

2013 6 /

56 (?) ÷(Walk) ÷);

?(Trail) ?(Path) (Cycle, ù?(Euler, 1736): v∈V (G) d(v) = 2|E(G)|. ó?: ? ? í (chenxiongda@gmail.com)March 27,

2013 6 /

56 (?) ÷(Walk) ÷);

?(Trail) ?(Path) (Cycle, ù?(Euler, 1736): v∈V (G) d(v) = 2|E(G)|. ó?: ? ? í (chenxiongda@gmail.com)March 27,

2013 6 /

56 ( ) : ? ? ? í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, : G = (V, E)?n ? , V ?? , ? ?G ? ? ?G í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, : G = (V, E)?n ? , V ?? , ? ?G ? ? ?G è : í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, : G = (V, E)?n ? , V ?? , ? ?G ? ? ?G è : ( ): ? G = (X, Y, E), ? ? ? ?êè X Y X Y í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, : G = (V, E)?n ? , V ?? , ? ?G ? ? ?G è : ( ): ? G = (X, Y, E), ? ? ? ?êè X Y X Y í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, : G = (V, E)?n ? , V ?? , ? ?G ? ? ?G è : ( ): ? G = (X, Y, E), ? ? ? ?êè X Y X Y ? : G Y ? í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ) : ? ? ? ?, : G = (V, E)?n ? , V ?? , ? ?G ? ? ?G è : ( ): ? G = (X, Y, E), ? ? ? ?êè X Y X Y ? : G Y ? k- ? : G ? ? ?k í (chenxiongda@gmail.com)March 27,

2013 7 /

56 ( ? ) G = (V, E), |V | = n, |E| = m;

í (chenxiongda@gmail.com)March 27,

2013 8 /

56 ( ? ) G = (V, E), |V | = n, |E| = m;