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Step * 2 of Lemma qadd_grp_wf2

.....set predicate..... 
Inverse(|<ℚ+>|;*;e;~)
BY
{ (RepUR ``inverse`` 0 THEN Auto) }

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Latex:

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Latex:
.....set  predicate..... 
Inverse(|<\mBbbQ{}+>|;*;e;\msim{})


By

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Latex:
(RepUR  ``inverse``  0  THEN  Auto)

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