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Step * of Lemma assoced_functionality_wrt_assoced

∀a,b,a',b':ℤ.  ((a ~ a') ⇒ (b ~ b') ⇒ (a ~ b ⇐⇒ a' ~ b'))
BY
{ (BLemma `equiv_rel_self_functionality` THEN Auto) }

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Latex:

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Latex:
\mforall{}a,b,a',b':\mBbbZ{}.    ((a  \msim{}  a')  {}\mRightarrow{}  (b  \msim{}  b')  {}\mRightarrow{}  (a  \msim{}  b  \mLeftarrow{}{}\mRightarrow{}  a'  \msim{}  b'))


By

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Latex:
(BLemma  `equiv\_rel\_self\_functionality`  THEN  Auto)

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