8 lines
275 B
Text
8 lines
275 B
Text
@[elab_as_elim] theorem Eq.subst' {α} {motive : α → Prop} {a b : α} :
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a = b → motive a → motive b := Eq.subst
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example (P : α → Prop) {a b} (e : a = b) (h : P a) : P b :=
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Eq.subst' e h
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example (P : α → Prop) {a b} (e : a = b) (h : P a) : P b :=
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e ▸ h
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