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Step * of Lemma pscm-presheaf-fst

∀[p,s:Top].  ((p.1)s ~ (p)s.1)
BY
{ (PscmUnfolding THEN RepUR ``presheaf-fst`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[p,s:Top].    ((p.1)s  \msim{}  (p)s.1)


By

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Latex:
(PscmUnfolding  THEN  RepUR  ``presheaf-fst``  0  THEN  Auto)

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