2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/62805This paper is a survey of several papers in quandle homology theory and cocycle knot invariants that have been published recently. Here we describe cocycle knot invariants that are defined in a state-sum form, quandle homology, and methods of constructing non-trivial cohomology classes.This is a survey article in recent results on the invariants of knots and knotted surfaces derived from quandle homologyGeometric TopologyAlgebraic Topology57M25; 57Q45; 57M05; 55N99; 55N22text