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Step * of Lemma eq_pair_wf

∀[s,t:DSet]. ∀[a,b:|s| × |t|].  (a =b b ∈ 𝔹)
BY
{ ((Unfold `eq_pair` 0) THEN Auto) }

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Latex:

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Latex:
\mforall{}[s,t:DSet].  \mforall{}[a,b:|s|  \mtimes{}  |t|].    (a  =\msubb{}  b  \mmember{}  \mBbbB{})


By

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Latex:
((Unfold  `eq\_pair`  0)  THEN  Auto)

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