Aris Martinian, Benjamin Steinberg

2026.6.8SEMIGROUP FORUM

DOI: 10.1007/s00233-026-10648-0

Abstract

Fiedorowicz suggested that it was likely that every finite simply connected CW complex is homotopy equivalent to the classifying space of a finite semigroup. We prove that every finite wedge of simply connected Moore spaces of finitely generated abelian groups is homotopy equivalent to the classifying space of a finite semigroup. Consequently, homology groups alone cannot preclude a finite simply connected CW complex from being homotopy equivalent to the classifying space of a finite semigroup.

Citation format

MARTINIAN, Aris; STEINBERG, Benjamin. Realizing wedges of moore spaces as classifying spaces of finite semigroups. SEMIGROUP FORUM, 2026.