2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/59822In this paper we compute the mod 2 cohomology of the Sylow 2-subgroup of the Higman-Sims group HS, one of the 26 sporadic simple groups. We obtain its Poincare series as well as an explicit description of it as a ring with 17 generators and 79 relationsAlgebraic TopologyGroup Theory20J06, 55R35The Cohomology of the Sylow 2-subgroup of the Higman-Sims Grouptext