Author:
Kirby Robion,Thompson Abigail
Abstract
We define an integer invariant LX of a smooth, compact, closed 4-manifold X by minimizing a certain complexity of a trisection of X over all trisections. The good feature of LX is that when LX=0 and X is a homology 4-sphere, then X is diffeomorphic to the 4-sphere. Naturally, L is hard to compute.
Publisher
Proceedings of the National Academy of Sciences
Cited by
7 articles.
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