227e16ea6b
Procedure for building an efficient disequality proof for natural number values encoded in binary.
19 lines
602 B
C++
19 lines
602 B
C++
/*
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Copyright (c) 2016 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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*/
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#pragma once
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#include "kernel/expr.h"
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namespace lean {
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/** \brief If 'a' and 'b' are two distinct natural number values, then return a proof
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they are disequal. Otherwise return none.
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\remark This function assumes 'a' and 'b' have type nat.
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\remark A natural number value is any expression built using
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bit0, bit1, zero, one, nat.succ and nat.zero */
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optional<expr> mk_nat_val_ne_proof(expr const & a, expr const & b);
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}
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