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 clifford(const std::string & n, const ex & mu);
48 clifford(const std::string & n, const exvector & iv);
49 clifford(const std::string & n, exvector * ivp);
51 // functions overriding virtual functions from base classes
53 void printraw(std::ostream & os) const;
54 void printtree(std::ostream & os, unsigned indent) const;
55 void print(std::ostream & os, unsigned upper_precedence=0) const;
56 bool info(unsigned inf) const;
57 // ex eval(int level=0) const;
59 bool is_equal_same_type(const basic & other) const;
60 ex simplify_ncmul(const exvector & v) const;
61 ex thisexprseq(const exvector & v) const;
62 ex thisexprseq(exvector * vp) const;
64 // new virtual functions which can be overridden by derived classes
67 // non-virtual functions in this class
75 inline const clifford &ex_to_clifford(const ex &e)
77 return static_cast<const clifford &>(*e.bp);
80 clifford clifford_gamma(const ex & mu);
82 #ifndef NO_NAMESPACE_GINAC
84 #endif // ndef NO_NAMESPACE_GINAC
86 #endif // ndef __GINAC_CLIFFORD_H__