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Step * of Lemma cancel_wf

∀[T,S:Type]. ∀[op:S ⟶ T ⟶ T].  (Cancel(T;S;op) ∈ ℙ)
BY
{ Unfold `cancel` 0 THEN Auto }

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Latex:

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Latex:
\mforall{}[T,S:Type].  \mforall{}[op:S  {}\mrightarrow{}  T  {}\mrightarrow{}  T].    (Cancel(T;S;op)  \mmember{}  \mBbbP{})


By

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Latex:
Unfold  `cancel`  0  THEN  Auto

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