## partial equivalence relation

(PER) A relation R on a set S where R is symmetric (x R y => y R x) and transitive (x R y R z => x R z) and where there may exist elements in S for which the relation is not defined. A PER is an equivalence relation on the subset for which it is defined, i.e. it is also reflexive (x R x).

### Nearby terms:

Partial Differential Equation LANguage ♦ **partial equivalence relation** ♦ partial evaluation

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