Nuprl Lemma : qadd_functionality_wrt_qle 11,40

abcd:a  b  c  d  a + c  b + d 
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DefinitionsP & Q, T, P  Q, P  Q, , True, t  T, P  Q, x:AB(x)
Lemmasqadd wf, qle transitivity qorder, qadd com, true wf, squash wf, grp op preserves le qorder, rationals wf, qle wf

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