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Step * of Lemma squash_elim

∀[P:ℙ]. (SqStable(P) ⇒ (↓P ⇐⇒ P))
BY
{ (Unfold `sq_stable` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[P:\mBbbP{}].  (SqStable(P)  {}\mRightarrow{}  (\mdownarrow{}P  \mLeftarrow{}{}\mRightarrow{}  P))


By

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Latex:
(Unfold  `sq\_stable`  0  THEN  Auto)

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