EntityQ3526736· pop 6· linked from 52 articlescombinatorial group theorySign in to savetheory of free groups, and the concept of a presentation of a group by generators and relations.ConnectionsmathematicsEntityInternational Standard Book NumberEntityWilliam Rowan HamiltonEntityFelix KleinEntityfundamental groupEntitysymmetry groupEntitysimplicial complexEntityfree groupEntitygeometric group theoryEntitypresentation of a groupEntityWalther von DyckEntityundecidable problemEntitygeometric topologyEntityBurnside's problemEntityWilhelm MagnusEntityicosahedral symmetryEntitygeneratorEntityrelation (mathematics)Entityword problem for groupsEntityCategoriesCombinatorial group theory