9 lines
219 B
Text
9 lines
219 B
Text
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Set: pp::colors
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Set: pp::unicode
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Assumed: C
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Assumed: D
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Assumed: R
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Proved: R2
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Theorem R2 (A1 A2 B1 B2 : Type) (H : A1 → B1 = A2 → B2) (a : A1) : B1 = B2 :=
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R A1 A2 (λ a : A1, B1) (λ _ : A2, B2) H a
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