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arxiv: 1809.00662 · v2 · pith:HWWWAU5Enew · submitted 2018-09-03 · 🧮 math.CO

A minimal counterexample to a strengthening of Perles' conjecture

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keywords conjectureconnectedcounterexamplegraphminimalperlespolytopesubgraph
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In this paper, we present a minimal counterexample to a conjecture of Perles that answers a question of Haase and Ziegler. The example is a simple 4-polytope that has an induced 3-connected 3-regular subgraph, whose graph complement is connected. This subgraph is planar and not the graph of a facet of the polytope.

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