Nuprl Lemma : rel_inverse_exp 4,23

T:Type, R:(TTProp), n:xy:T. (x R^n^-1 y (x R^-1^n y
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DefinitionsAB, A, False, P  Q, x f y, R^-1, R^n, ij, P  Q, Prop, x:AB(x), t  T, , i=j, P & Q, P  Q, Unit, , b, b, x:AB(x), SQType(T), {T}, True
Lemmasrel exp add, assert wf, not wf, bnot wf, bool wf, eq int wf, assert of eq int, not functionality wrt iff, assert of bnot, iff transitivity, eqff to assert, eqtt to assert, rel inverse wf, rel exp wf, le wf, nat wf, nat properties, ge wf

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