| − | The fundamental group is a concept in the study of [[algebraic topology]]. For every point in a [[topological space]], one can associate with it a group that conveys information on an open neighbourhood of that point. The fundamental group is also the first [[homotopy group]]. | + | The fundamental group is a concept in the study of [[algebraic topology]], used primarily to distinguish one [[topological space]] from another. The fundamental group is the first [[homotopy group]], defined at a particular point to be the set of loops based at the point, modulo the relationship of being contractible to the identity loop. |