Abstract

A graph G = ( V , E ) is called l-mixed p-connected if G - S - L is connected for all pairs S , L with S ⊆ V , L ⊆ E , and l | S | + | L | < p . This notion is a common generalisation of m-vertex-connectivity ( l = 1 , p = m ) and m-edge-connectivity ( l ⩾ m , p = m ). We show how to use maximum adjacency orderings to find sparse certificates and removable cycles in l-mixed p-connected graphs in linear time.

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