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20242026
most citedInvariant systems of weighted representatives

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math.GT2025

Tiny non-Leighton complexes

Natalia S. Dergacheva, Anton A. Klyachko

How complex must two finite 2-complexes be to admit a common, but not finite common, covering? We obtain an almost answer: the minimum possible number of triangles in a pseudo-simp…

math.GT2024

Forester's lattices and small non-Leighton complexes

Natalia S. Dergacheva, Anton A. Klyachko

We construct two CW-complexes and admitting a common, but not finite common, covering, where is homeomorphic to a complex with a single 2-cell.