奇圈 meaning in English

odd cycle

A graph is bipartite if it does not contain an odd cycle .
一个图是二部图，如果它不包含奇圈。
Some core problems caused many people ' s interests , but they have not been resolved . such as the four color - theory of planar . in this paper , we will obtain a conclusion : graphs g ( k > 2d , gcd ( k , d ) = 1 ) other than odd circle are nonplanar and then based on it , we easily obtain two corollaries about circular clique number ( clique number ) and circular chromatic number ( chromatic number ) of planar : for any planar , it ' s circular clique number is 2 4 - or integers not more than 4 ; if a planar is circular perfect or ( perfect ) , then it satisfy four color - theory
图论中，着色问题及色数问题是十分活跃的研究课题，一些焦点问题引起了不少人们的兴趣，却有待解决，例如平面图的四色猜想，始终是悬而未决，在这篇文章中，我们将得出一个结论： g _ d ~ k ( k 2d ， gcd ( k ， d ) = 1 )图除了奇圈以外，都是非平面的，并在此基础上得出有关平面图圈团数(团数) 、圈色数(色数)的两个推论：任意平面图的圈团数只能是2 + 1 / n或者不大于4的整数，如果平面图圈优美(或者优美) ，那么，它满足四色定理。