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math.GR2026
Topological perspectives on the vanishing of some Bogomolov multipliers
Eric Samperton, Carlos Segovia
Since the 1980s, the Bogomolov multiplier of a finite group has been known to obstruct rationality in complex algebraic geometry, and more recently it is understood to be responsib…
math.GR2026
Obstruction theory and the complexity of counting group homomorphisms
Eric Samperton, Armin WeiÃ
Fix a finite group . We study the computational complexity of counting problems of the following flavor: given a group , count the number of homomorphisms . Our fir…