Step
*
of Lemma
rel_equivalent_wf
∀[T:Type]. ∀[R1,R2:T ⟶ T ⟶ ℙ].  (R1 
⇐⇒ R2 ∈ ℙ)
BY
{ (Unfold `rel_equivalent` 0 THEN Auto) }
Latex:
Latex:
\mforall{}[T:Type].  \mforall{}[R1,R2:T  {}\mrightarrow{}  T  {}\mrightarrow{}  \mBbbP{}].    (R1  \mLeftarrow{}{}\mRightarrow{}  R2  \mmember{}  \mBbbP{})
By
Latex:
(Unfold  `rel\_equivalent`  0  THEN  Auto)
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