equivalence mathematics is an unlikely candidate for an article actually all such equivalences are examples of an equivalence relation or its generalizations beyond the set theory such as canonically isomorphic objects in the category theory equivalence in mathematical parlance does not specify any definite relation on a set or so there are many cases where up to equivalence is used implicitly and the appropriate wikilink has to be not a generally nonsensical equivalence mathematics but an article about a more concrete implementation of equivalence relation