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Step * of Lemma rel_equivalent_weakening

∀[T:Type]. ∀[R1,R2:T ⟶ T ⟶ ℙ].  R1 ⇐⇒ R2 supposing R1 = R2 ∈ (T ⟶ T ⟶ ℙ)
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  supposing  R1  =  R2


By

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

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