12 lines
380 B
Text
12 lines
380 B
Text
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variable A : Type.{1}
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definition bool : Type.{1} := Type.{0}
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variable Exists (P : A → bool) : bool
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notation `exists` binders `,` b:(scoped b, Exists b) := b
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notation `∃` binders `,` b:(scoped b, Exists b) := b
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variable p : A → bool
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variable q : A → A → bool
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check exists x : A, p x
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check ∃ x y : A, q x y
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notation `{` binder `|` b:scoped `}` := b
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check {x : A | x}
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