[Submitted on 12 Jun 2026]

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Abstract:We show that \textsc{number of bistellar moves and sparse degree-two edge collapses for 3-sphere} is NP-hard. It follows that a similar problem for an arbitrary 3-manifold is NP-hard as well. This is the first NP-hardness result concerning moves between two triangulations of a 3-manifold.

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From: Stephan Tillmann [view email]
[v1] Fri, 12 Jun 2026 12:48:03 UTC (5,505 KB)

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