Nuprl Lemma : int_hgrp_el_wf 13,42

n:. zhgrp(n)  |(<+>hgrp)| 
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Upgroups 1
Definitions of Statementzhgrp(n)
Definitionszhgrp(n), t  T, x:A. B(x), S  T
Lemmasnat wf, nat inc

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