3 * Interface to GiNaC's clifford objects. */
6 * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef __GINAC_CLIFFORD_H__
24 #define __GINAC_CLIFFORD_H__
27 #include "lortensor.h"
29 #ifndef NO_NAMESPACE_GINAC
31 #endif // ndef NO_NAMESPACE_GINAC
34 /** This class holds an object representing an element of the Clifford
35 * algebra (the Dirac gamma matrices). These objects only carry Lorentz
36 * indices. Spinor indices are always hidden in our implementation. */
37 class clifford : public lortensor
39 GINAC_DECLARE_REGISTERED_CLASS(clifford, lortensor)
43 friend clifford clifford_gamma(const ex & mu);
47 // default constructor, destructor, copy constructor assignment operator and helpers
51 clifford(const clifford & other);
52 const clifford & operator=(const clifford & other);
54 void copy(const clifford & other);
55 void destroy(bool call_parent);
59 clifford(const std::string & n, const ex & mu);
60 clifford(const std::string & n, const exvector & iv);
61 clifford(const std::string & n, exvector * ivp);
63 // functions overriding virtual functions from base classes
65 basic * duplicate() const;
66 void printraw(std::ostream & os) const;
67 void printtree(std::ostream & os, unsigned indent) const;
68 void print(std::ostream & os, unsigned upper_precedence=0) const;
69 bool info(unsigned inf) const;
70 // ex eval(int level=0) const;
72 int compare_same_type(const basic & other) const;
73 bool is_equal_same_type(const basic & other) const;
74 ex simplify_ncmul(const exvector & v) const;
75 ex thisexprseq(const exvector & v) const;
76 ex thisexprseq(exvector * vp) const;
78 // new virtual functions which can be overridden by derived classes
81 // non-virtual functions in this class
89 inline const clifford &ex_to_clifford(const ex &e)
91 return static_cast<const clifford &>(*e.bp);
94 clifford clifford_gamma(const ex & mu);
96 #ifndef NO_NAMESPACE_GINAC
98 #endif // ndef NO_NAMESPACE_GINAC
100 #endif // ndef __GINAC_CLIFFORD_H__