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Journal Articles Journal of Combinatorial Theory, Series B Year : 2009

Removable cycles in non-bipartite graphs

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K. Kawarabayashi
  • Function : Author
O. Lee
  • Function : Author

Abstract

In this paper we prove the following result. Suppose that s and t are vertices of a 3-connected graph G such that G-s-t is not bipartite and there is no cutset X of size three in G for which some component U of G-X is disjoint from s,t. Then either (1) G contains an induced path P from s to t such that G-V(P) is not bipartite or (2) G can be embedded in the plane so that every odd face contains one of s or t. Furthermore, if (1) holds then we can insist that G-V(P) is connected, while if G is 5-connected then (1) must hold and P can be chosen so that G-V(P) is 2-connected.

Dates and versions

hal-00795287 , version 1 (27-02-2013)

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K. Kawarabayashi, O. Lee, Bruce Reed. Removable cycles in non-bipartite graphs. Journal of Combinatorial Theory, Series B, 2009, 99, pp.30―38. ⟨10.1016/j.jctb.2008.03.007⟩. ⟨hal-00795287⟩
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