Nuprl Lemma : atom-free-nat 0,22

n:. AtomFree(;n
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DefinitionsVoid, a<b, n-m, n+m, -n, #$n, AB, A, False, ij, P  Q, {x:AB(x) }, x:AB(x), AtomFree(T;x), x:AB(x), t  T, , s = t, , s ~ t, f(a), x.A(x)
Lemmasle wf, nat wf, nat properties, ge wf

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