14 lines
No EOL
362 B
Text
14 lines
No EOL
362 B
Text
Theorem T (A : Type) (p : A -> Bool) (f : A -> A -> A) : forall x y z, p (f x x) => x = y => x = z => p (f y z).
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apply ForallIntro.
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apply beta_tac.
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apply ForallIntro.
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apply beta_tac.
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apply ForallIntro.
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apply beta_tac.
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apply Discharge.
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apply Discharge.
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apply Discharge.
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apply (Subst (Subst H H::1) H::2)
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done.
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Show Environment 1. |