Nuprl Lemma : assert_of_set_lt 13,42

p:PosetSig, ab:|p|. ((a < b)) = (a <p b  
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Upsets 1
Definitions of Statementa <p b
Definitionst  T, a <p b, , x:AB(x)
Lemmasposet sig wf, set car wf, set blt wf, assert wf

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