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Step * 1 3 of Lemma int_add_grp_wf


Inverse(ℤ;λx,y. (x + y);0;λx.(-x))
BY
{ ((AbEval ``inverse`` 0) THEN Auto) }

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Latex:

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Latex:

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


By

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

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