10 lines
320 B
Text
10 lines
320 B
Text
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-- Copyright (c) 2014 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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import logic
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definition is_set (A : Type) := Π (x y : A) (p q : x = y), p = q
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inductive hset : Type :=
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| hset_intro : Π (A : Type), is_set A → hset
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