Step of Proof: int_nzero_properties 9,38

Inference at * 
Iof proof for Lemma int nzero properties:


  i:i  0 
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 by ProvePropertiesLemma 
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 .


Definitions, t  T, False, P  Q, A, a  b  T , x:AB(x),
Lemmasint nzero wf

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