Rooted prism-minors and disjoint cycles containing a specified edge

Abstract

Dirac and Lov\'asz independently characterized the 3-connected graphs with no pair of vertex-disjoint cycles. Equivalently, they characterized all 3-connected graphs with no prism-minors. In this paper, we completely characterize the 3-connected graphs with an edge that is contained in the union of no pair of vertex-disjoint cycles. As applications, we answer the analogous questions for edge-disjoint cycles and for 4-connected graphs and we completely characterize the 3-connected graphs with no prism-minor using a specified edge.

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