8 lines
275 B
Text
8 lines
275 B
Text
Set: pp::colors
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Set: pp::unicode
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Set: lean::pp::implicit
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Set: pp::colors
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Assumed: N
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Defined: T
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definition T (a : N) (f : N → N) (H : @eq N (f a) a) : @eq N (f (f a)) (f (f a)) :=
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@substp N (f a) a (λ x : N, @eq N (f (f a)) (f (f a))) (@refl N (f (f a))) H
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