9.5 Equivalence Relations - UCB Mathematics

same" is the central idea of equivalence relations. A partition of a set S is a nite or in nite collection of nonempty, mutually disjoint subsets whose union is S. De nition 1. A partition of a set S is a collection of disjoint nonempty subsets of S that have S as their union. In other words, the collection of subsets A ................
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