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Step * of Lemma mk_perm_wf

∀T:Type. ∀f,b:T ⟶ T.  (mk_perm(f;b) ∈ perm_sig(T))
BY
{ (Unfolds ``mk_perm perm_sig`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}T:Type.  \mforall{}f,b:T  {}\mrightarrow{}  T.    (mk\_perm(f;b)  \mmember{}  perm\_sig(T))


By

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Latex:
(Unfolds  ``mk\_perm  perm\_sig``  0  THEN  Auto)

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