Step * 1 2 1 2 of Lemma qrng_wf


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


Latex:


Latex:

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


By


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




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