33 lines
593 B
Text
33 lines
593 B
Text
import logic tools.tactic
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open tactic
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theorem tst1 (a b : Prop) : a → b → b :=
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by intro Ha; intro Hb; apply Hb
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theorem tst2 (a b : Prop) : a → b → a ∧ b :=
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by intro Ha; intro Hb; apply and.intro; apply Hb; apply Ha
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theorem tst3 (a b : Prop) : a → b → a ∧ b :=
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begin
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intro Ha,
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intro Hb,
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apply and.intro,
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apply Hb,
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apply Ha
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end
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theorem tst4 (a b : Prop) : a → b → a ∧ b :=
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begin
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intros (Ha, Hb),
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apply and.intro,
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apply Hb,
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apply Ha
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end
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theorem tst5 (a b : Prop) : a → b → a ∧ b :=
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begin
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intros,
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apply and.intro,
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eassumption,
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eassumption
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end
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