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Step * 1 2 1 2 of Lemma qrng_wf


Inverse(ℚ;λx,y. (x + y);0;λx.-(x))
BY
{ (InstLemma `igrp_properties` [⌜<ℚ+>⌝]⋅ THEN Auto) }

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Latex:

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Latex:

Inverse(\mBbbQ{};\mlambda{}x,y.  (x  +  y);0;\mlambda{}x.-(x))


By

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Latex:
(InstLemma  `igrp\_properties`  [\mkleeneopen{}<\mBbbQ{}+>\mkleeneclose{}]\mcdot{}  THEN  Auto)

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