Nuprl Lemma : int_entire_a 13,42

ab:a  0  b  0  a * b  0 
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Upint 2, int 2
Definitionst  T, P  Q, x:AB(x), False, A, a  b  T , P  Q, Dec(P),
Lemmasnequal wf, decidable int equal, int entire

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