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10 lines
213 B
Plaintext
10 lines
213 B
Plaintext
import logic
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section
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variables (A : Type) (p q : A → Prop)
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example : (∀x : A, p x ∧ q x) → ∀y : A, p y :=
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assume H : ∀x : A, p x ∧ q x,
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take y : A,
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show p y, from and.elim_left (H y)
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end
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