2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/72444This article explains basic constructions and results on group algebras and their cohomology, starting from the point of view of commutative algebra. It provides the background necessary for a novice in this subject to begin reading Dave Benson's article in the same MSRI volume that this article is slated to appear in.To appear in: Trends in Commutative Algebra, MSRI Publications, Volume 51, 2004; 36 pagesCommutative AlgebraRings and Algebras13C15; 13C25. Secondary 18G15; 13D45text