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Step * of Lemma church_fst_lemma

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∀y,x:Top.  (church-fst() (church-pair() x y) ~ x)
BY
{ (UnivCD THENA Auto) }

1
1. y : Top@i
2. x : Top@i
⊢ church-fst() (church-pair() x y) ~ x

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Latex:

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Latex:
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\mforall{}y,x:Top.    (church-fst()  (church-pair()  x  y)  \msim{}  x)


By

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Latex:
(UnivCD  THENA  Auto)

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