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Step * of Lemma cc-fst+-comp-1

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∀[G:j⊢]. (p+ o [1(𝕀)] = [1(𝕀)] o p ∈ G.𝕀 ij⟶ G.𝕀)
BY
{ (Intros THEN (Subst' p+ o [1(𝕀)] ~ [1(𝕀)] o p 0 THENA CsmUnfolding) THEN Auto) }

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Latex:

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Latex:
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\mforall{}[G:j\mvdash{}].  (p+  o  [1(\mBbbI{})]  =  [1(\mBbbI{})]  o  p)


By

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Latex:
(Intros  THEN  (Subst'  p+  o  [1(\mBbbI{})]  \msim{}  [1(\mBbbI{})]  o  p  0  THENA  CsmUnfolding)  THEN  Auto)

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