Step of Proof: int_iseg_properties 12,41

Inference at * 
Iof proof for Lemma int iseg properties:


  ij:y:{i...j}. (i  y) & (y  j
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 by ProvePropertiesLemma 
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 .


DefinitionsTrue, T, t  T, x:AB(x), P  Q, SqStable(P), P & Q, {i...j}
Lemmasint iseg wf, decidable le, sq stable from decidable, le wf, sq stable and

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