color.h

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/*
 *  GiNaC Copyright (C) 1999-2026 Johannes Gutenberg University Mainz, Germany
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef GINAC_COLOR_H
#define GINAC_COLOR_H
 
#include "indexed.h"
#include "tensor.h"
 
#include <set>
 
namespace GiNaC {
 
class color : public indexed
{
    GINAC_DECLARE_REGISTERED_CLASS(color, indexed)
    // other constructors
public:
    color(const ex & b, unsigned char rl = 0);
    color(const ex & b, const ex & i1, unsigned char rl = 0);
 
    // internal constructors
    color(unsigned char rl, const exvector & v);
    color(unsigned char rl, exvector && v);
    void archive(archive_node& n) const override;
    void read_archive(const archive_node& n, lst& sym_lst) override;
 
    // functions overriding virtual functions from base classes
protected:
    ex eval_ncmul(const exvector & v) const override;
    bool match_same_type(const basic & other) const override;
    ex thiscontainer(const exvector & v) const override;
    ex thiscontainer(exvector && v) const override;
    unsigned return_type() const override { return return_types::noncommutative; }
    return_type_t return_type_tinfo() const override;
 
    // non-virtual functions in this class
public:
    unsigned char get_representation_label() const {return representation_label;}
 
    // member variables
private:
    unsigned char representation_label; 
};
GINAC_DECLARE_UNARCHIVER(color); 
 
 
class su3one : public tensor
{
    GINAC_DECLARE_REGISTERED_CLASS(su3one, tensor)
 
    // non-virtual functions in this class
protected:
    void do_print(const print_context & c, unsigned level) const;
    void do_print_latex(const print_latex & c, unsigned level) const;
};
GINAC_DECLARE_UNARCHIVER(su3one);
 
class su3t : public tensor
{
    GINAC_DECLARE_REGISTERED_CLASS(su3t, tensor)
 
    // functions overriding virtual functions from base classes
public:
    bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const override;
 
    // non-virtual functions in this class
protected:
    void do_print(const print_context & c, unsigned level) const;
    void do_print_latex(const print_latex & c, unsigned level) const;
};
GINAC_DECLARE_UNARCHIVER(su3t);
 
class su3f : public tensor
{
    GINAC_DECLARE_REGISTERED_CLASS(su3f, tensor)
 
    // functions overriding virtual functions from base classes
public:
    ex eval_indexed(const basic & i) const override;
    bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const override;
protected:
    unsigned return_type() const override { return return_types::commutative; }
 
    // non-virtual functions in this class
protected:
    void do_print(const print_context & c, unsigned level) const;
    void do_print_latex(const print_latex & c, unsigned level) const;
};
GINAC_DECLARE_UNARCHIVER(su3f);
 
class su3d : public tensor
{
    GINAC_DECLARE_REGISTERED_CLASS(su3d, tensor)
 
    // functions overriding virtual functions from base classes
public:
    ex eval_indexed(const basic & i) const override;
    bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const override;
protected:
    unsigned return_type() const override { return return_types::commutative; }
 
    // non-virtual functions in this class
protected:
    void do_print(const print_context & c, unsigned level) const;
    void do_print_latex(const print_latex & c, unsigned level) const;
};
GINAC_DECLARE_UNARCHIVER(su3d);
 
 
// global functions
 
ex color_ONE(unsigned char rl = 0);
 
ex color_T(const ex & a, unsigned char rl = 0);
 
ex color_f(const ex & a, const ex & b, const ex & c);
 
ex color_d(const ex & a, const ex & b, const ex & c);
 
ex color_h(const ex & a, const ex & b, const ex & c);
 
ex color_trace(const ex & e, const std::set<unsigned char> & rls);
 
ex color_trace(const ex & e, const lst & rll);
 
ex color_trace(const ex & e, unsigned char rl = 0);
 
} // namespace GiNaC
 
#endif // ndef GINAC_COLOR_H