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Step * of Lemma antecedent-surjection_wf

∀[es:EO]. ∀[P,Q:E ⟶ ℙ]. ∀[f:{e:E| P e}  ⟶ {e:E| Q e} ].  (Q ←⟵ f── P ∈ ℙ)
BY
{ (Unfold `antecedent-surjection` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[es:EO].  \mforall{}[P,Q:E  {}\mrightarrow{}  \mBbbP{}].  \mforall{}[f:\{e:E|  P  e\}    {}\mrightarrow{}  \{e:E|  Q  e\}  ].    (Q  \mleftarrow{}\mleftarrow{}{}  f{}{}  P  \mmember{}  \mBbbP{})


By

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Latex:
(Unfold  `antecedent-surjection`  0  THEN  Auto)

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