2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65559The homology and cohomology of quandles and racks are used in knot theory: given a finite quandle and a cocycle, we can construct a knot invariant. This is a quick introductory survey to the invariants of knots derived from quandles and racks.Published by Geometry and Topology Monographs at http://www.maths.warwick.ac.uk/gt/GTMon4/paper8.abs.htmlGeometric Topology57M25, 57Q45, 55N99, 18G99text