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Step * of Lemma ring_term_value_minus_lemma

∀r,a,f:Top.  (ring_term_value(f;"-"a) ~ -r ring_term_value(f;a))
BY
{ (RepUR ``ring_term_value`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}r,a,f:Top.    (ring\_term\_value(f;"-"a)  \msim{}  -r  ring\_term\_value(f;a))


By

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Latex:
(RepUR  ``ring\_term\_value``  0  THEN  Auto)

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