EntityQ1195852· pop 22· linked from 142 articlescenterSign in to savethe set of elements that commute with every element of a groupConnectionsMegaminxEntityconjugacy classEntityorthogonal groupEntityinner automorphismEntitycharacteristic subgroupEntityperfect groupEntityInternational Standard Book NumberEntityreal numberEntitysetEntitypolygonEntitydigital object identifierEntityInternational Standard Serial NumberEntitygroupEntityabstract algebraEntityquaternionEntitycommutative propertyEntityfieldEntityintersectionEntityabelian groupEntityif and only ifEntityCategoriesFunctional subgroupsGroup theory