EntityQ2914964· pop 15· linked from 274 articlesup toSign in to savemathematical statement of uniqueness, except for an equivalent structure (equivalence relation)Connectionsequivalence classEntitysymmetryEntitygroupEntityTetrisEntityhexagonEntitygroup theoryEntityrotationEntitypermutationEntityisomorphismEntitystylistic deviceEntityequivalence relationEntitysimilarityEntityregular polygonEntityinfinitesimalEntityconstant functionEntitypartition of a setEntitymathematical objectEntityMathWorldEntitycyclic groupEntityEight queens puzzleEntityCategoriesMathematical terminology