出典:Wikipedia
出典:『Wikipedia』 (2011/04/24 23:16 UTC 版)
In combinatorics, an area of mathematics, graph enumeration describes a class of combinatorial enumeration problems in which one must count undirected or directed graphs of certain types, typically as a function of the number of vertices of the graph. The pioneers in this area of mathematics were Polya, Cayley and Redfield.