Kempe classes and the Hadwiger Conjecture
Kempe classes and the Hadwiger Conjecture
复制标题
肯佩级和哈维格猜想
DOI:
10.1016/s0095-8956(81)80014-7
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发表时间:
1981
期刊:
影响因子:
--
通讯作者:
H. Meyniel
中科院分区:
文献类型:
--
作者:
M. Vergnas;H. Meyniel
Let G be a graph I with vertex-set V. A coloring of G is a mapping of V into a given set--the set of colors--such thatf (x)--# f (y) for all edges {x, y} of G. The chromatic number of G, denoted by 7 (G), is the least number of colors of a coloring of G.Consider a coloringfof G, a and fl two different colors and A a connected component of the subgraph of G induced by the vertices colored in a or fl by f (in short: a (f; a, fl)-component of G). Define f'by f'(x)= f (x) for