3 * Interface to GiNaC's non-commutative products of expressions. */
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_NCMUL_H__
24 #define __GINAC_NCMUL_H__
30 /** Non-commutative product of expressions. */
31 class ncmul : public exprseq
33 GINAC_DECLARE_REGISTERED_CLASS(ncmul, exprseq)
36 friend ex nonsimplified_ncmul(const exvector & v);
37 friend ex simplified_ncmul(const exvector & v);
43 ncmul(const ex & lh, const ex & rh);
44 ncmul(const ex & f1, const ex & f2, const ex & f3);
45 ncmul(const ex & f1, const ex & f2, const ex & f3,
47 ncmul(const ex & f1, const ex & f2, const ex & f3,
48 const ex & f4, const ex & f5);
49 ncmul(const ex & f1, const ex & f2, const ex & f3,
50 const ex & f4, const ex & f5, const ex & f6);
51 ncmul(const exvector & v, bool discardable=false);
52 ncmul(exvector * vp); // vp will be deleted
54 // functions overriding virtual functions from bases classes
56 void print(std::ostream & os, unsigned upper_precedence) const;
57 void printraw(std::ostream & os) const;
58 void printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence = 0) const;
59 bool info(unsigned inf) const;
60 int degree(const symbol & s) const;
61 int ldegree(const symbol & s) const;
62 ex expand(unsigned options=0) const;
63 ex coeff(const symbol & s, int n=1) const;
64 ex eval(int level=0) const;
65 ex subs(const lst & ls, const lst & lr) const;
66 exvector get_free_indices(void) const;
67 ex thisexprseq(const exvector & v) const;
68 ex thisexprseq(exvector * vp) const;
70 ex derivative(const symbol & s) const;
71 unsigned return_type(void) const;
72 unsigned return_type_tinfo(void) const;
74 // new virtual functions which can be overridden by derived classes
77 // non-virtual functions in this class
79 unsigned count_factors(const ex & e) const;
80 void append_factors(exvector & v, const ex & e) const;
81 exvector expandchildren(unsigned options) const;
83 const exvector & get_factors(void) const;
88 static unsigned precedence;
93 ex nonsimplified_ncmul(const exvector & v);
94 ex simplified_ncmul(const exvector & v);
97 inline const ncmul &ex_to_ncmul(const ex &e)
99 return static_cast <const ncmul &>(*e.bp);
104 #endif // ndef __GINAC_NCMUL_H__