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Step * of Lemma rel_equivalent_inversion

∀[T:Type]. ∀[R1,R2:T ⟶ T ⟶ ℙ].  (R1 ⇐⇒ R2 ⇒ R2 ⇐⇒ R1)
BY
{ (Unfold `rel_equivalent` 0 THEN Auto)⋅ }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[R1,R2:T  {}\mrightarrow{}  T  {}\mrightarrow{}  \mBbbP{}].    (R1  \mLeftarrow{}{}\mRightarrow{}  R2  {}\mRightarrow{}  R2  \mLeftarrow{}{}\mRightarrow{}  R1)


By

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Latex:
(Unfold  `rel\_equivalent`  0  THEN  Auto)\mcdot{}

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