14 lines
306 B
Text
14 lines
306 B
Text
import data.list
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open perm
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example (p : Prop) (l : list nat) : ¬ l ~ l → p :=
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by blast
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example (a : nat) : ¬ a = a → false :=
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by blast
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example (A : Type) (p : Prop) (a b c : A) : a = b → ¬ b = a → p :=
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by blast
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example (A : Type) (p : Prop) (a b c : A) : a = b → b ≠ a → p :=
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by blast
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