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/****************************************************************************** |
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* Top contributors (to current version): |
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* Gereon Kremer |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Implements utilities for CAD projection operators. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__ARITH__NL__CAD_PROJECTIONS_H |
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#define CVC5__THEORY__ARITH__NL__CAD_PROJECTIONS_H |
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#ifdef CVC5_USE_POLY |
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#include <poly/polyxx.h> |
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#include <vector> |
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namespace cvc5 { |
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namespace theory { |
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namespace arith { |
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namespace nl { |
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namespace cad { |
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/** |
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* A simple wrapper around std::vector<poly::Polynomial> that ensures that all |
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* polynomials are properly factorized and pruned when added to the list. |
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*/ |
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class PolyVector : public std::vector<poly::Polynomial> |
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{ |
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private: |
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/** Disable all emplace() */ |
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void emplace() {} |
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/** Disable all emplace_back() */ |
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void emplace_back() {} |
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/** Disable all insert() */ |
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void insert() {} |
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/** Disable all push_back() */ |
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void push_back() {} |
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public: |
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PolyVector() {} |
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/** Construct from a set of polynomials */ |
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PolyVector(std::initializer_list<poly::Polynomial> i) |
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{ |
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for (const auto& p : i) add(p); |
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} |
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/** |
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* Adds a polynomial to the list of projection polynomials. |
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* Before adding, it factorizes the polynomials and removed constant factors. |
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*/ |
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void add(const poly::Polynomial& poly, bool assertMain = false); |
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/** Sort and remove duplicates from the list of polynomials. */ |
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void reduce(); |
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/** Make this list of polynomials a finest square-free basis. */ |
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void makeFinestSquareFreeBasis(); |
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/** Push polynomials with a lower main variable to another PolyVector. */ |
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void pushDownPolys(PolyVector& down, poly::Variable var); |
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}; |
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/** |
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* Computes McCallum's projection operator. |
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*/ |
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PolyVector projectionMcCallum(const std::vector<poly::Polynomial>& polys); |
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} // namespace cad |
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} // namespace nl |
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} // namespace arith |
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} // namespace theory |
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} // namespace cvc5 |
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#endif |
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#endif |