EntityQ7814222· pop 8· linked from 96 articlestolerance relationSign in to savereflexive symmetric relation compatible with the operations of an algebraic structureConnectionsbinary relationEntitylatticeEntitycoverEntityequivalence classEntitycongruence relationEntityInternational Standard Book NumberEntityHenri PoincaréEntitysetEntitydigital object identifierEntityInternational Standard Serial NumberEntitygroupEntityvector spaceEntityBoolean algebraEntityLibrary of Congress Control NumberEntityringEntitygraphEntityisomorphismEntitybijectionEntityalgebraic structureEntityapproximationEntityCategoriesApproximationsLattice theoryReflexive relationsSymmetric relationsUniversal algebra