EntityQ621461· pop 35· linked from 185 articlessymmetric relationSign in to savetype of binary relationConnectionspartially ordered setEntityweak orderingEntityOn-Line Encyclopedia of Integer SequencesEntityreflexive relationEntitytotal orderEntitysemilatticeEntityInternational Standard Book NumberEntitydivisionEntitysetEntitysymmetryEntitycommutative propertyEntitydivisorEntitypermutationEntityequivalence relationEntitymodular arithmeticEntityequalityEntityhomophoneEntitytransitive relationEntitybinary relationEntitylatticeEntityCategoriesProperties of binary relationsSymmetric relations