10 lines
275 B
Text
10 lines
275 B
Text
/-
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Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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Define countable types
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-/
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open function
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definition countable (A : Type) : Prop := ∃ f : A → nat, injective f
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