Новая страница: «'''Berge's conjecture''' --- гипотеза Бержа. In 1960, C.Berge conjectured that a graph is ''perfect'' iff none of its induced subgraphs is a <math>C_{…»
(Новая страница: «'''Berge's conjecture''' --- гипотеза Бержа. In 1960, C.Berge conjectured that a graph is ''perfect'' iff none of its induced subgraphs is a <math>C_{…»)