754276a660
This commit also replaces the notation for divides
`(` a `|` b `)`
with
a `∣` b
The character `∣` is entered by typing \|
closes #516
33 lines
736 B
Text
33 lines
736 B
Text
notation `⟪`:max t:(foldr `,` (e r, and.intro e r)) `⟫`:0 := t
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check ⟪ trivial, trivial, trivial ⟫
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theorem tst (a b c d : Prop) : a ∧ b ∧ c ∧ d ↔ d ∧ c ∧ b ∧ a :=
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begin
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apply iff.intro,
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begin
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intro H,
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match H with
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| ⟪ H₁, H₂, H₃, H₄ ⟫ := ⟪ H₄, H₃, H₂, H₁ ⟫
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end
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end,
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begin
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intro H,
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match H with
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| ⟪ H₁, H₂, H₃, H₄ ⟫ :=
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begin
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repeat (apply and.intro | assumption)
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end
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end
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end
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end
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print definition tst
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theorem tst2 (a b c d : Prop) : a ∧ b ∧ c ∧ d ↔ d ∧ c ∧ b ∧ a :=
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begin
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apply iff.intro,
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repeat (intro H; repeat (cases H with [H', H] | apply and.intro | assumption))
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end
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print definition tst2
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