2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152973In this paper we show that the mod 2 cohomology ring of any finite simple group of rank 3 or less (at the prime 2) must be Cohen-Macaulay.Algebraic TopologyGroup TheoryThe cohomology rings of rank 3 simple groups are Cohen-Macaulaytext