* Interface to GiNaC's color (SU(3) Lie algebra) objects. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2011 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
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef __GINAC_COLOR_H__
-#define __GINAC_COLOR_H__
+#ifndef GINAC_COLOR_H
+#define GINAC_COLOR_H
#include "indexed.h"
#include "tensor.h"
-namespace GiNaC {
+#include <set>
+namespace GiNaC {
/** This class holds a generator T_a or the unity element of the Lie algebra
* of SU(3), as used for calculations in quantum chromodynamics. A
* representation label (an unsigned 8-bit integer) is used to distinguish
* elements from different Lie algebras (objects with different labels
- * commute). These objects implement an abstract representation of the
+ * commutate). These objects implement an abstract representation of the
* group, not a specific matrix representation. The indices used for color
* objects should not have a variance. */
class color : public indexed
{
GINAC_DECLARE_REGISTERED_CLASS(color, indexed)
-
// other constructors
public:
color(const ex & b, unsigned char rl = 0);
// internal constructors
color(unsigned char rl, const exvector & v, bool discardable = false);
- color(unsigned char rl, exvector * vp); // vp will be deleted
+ color(unsigned char rl, std::auto_ptr<exvector> vp);
+ void archive(archive_node& n) const;
+ void read_archive(const archive_node& n, lst& sym_lst);
// functions overriding virtual functions from base classes
protected:
+ ex eval_ncmul(const exvector & v) const;
bool match_same_type(const basic & other) const;
- ex simplify_ncmul(const exvector & v) const;
- ex thisexprseq(const exvector & v) const;
- ex thisexprseq(exvector * vp) const;
- unsigned return_type(void) const { return return_types::noncommutative; }
- unsigned return_type_tinfo(void) const { return TINFO_color + representation_label; }
+ ex thiscontainer(const exvector & v) const;
+ ex thiscontainer(std::auto_ptr<exvector> vp) const;
+ unsigned return_type() const { return return_types::noncommutative; }
+ return_type_t return_type_tinfo() const;
// non-virtual functions in this class
public:
- unsigned char get_representation_label(void) const {return representation_label;}
+ unsigned char get_representation_label() const {return representation_label;}
// member variables
private:
unsigned char representation_label; /**< Representation label to distinguish independent color matrices coming from separated fermion lines */
};
+GINAC_DECLARE_UNARCHIVER(color);
/** This class represents the su(3) unity element. */
{
GINAC_DECLARE_REGISTERED_CLASS(su3one, tensor)
- // functions overriding virtual functions from bases classes
-public:
- void print(const print_context & c, unsigned level = 0) const;
+ // 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);
/** This class represents an su(3) generator. */
class su3t : public tensor
{
GINAC_DECLARE_REGISTERED_CLASS(su3t, tensor)
- // functions overriding virtual functions from bases classes
+ // functions overriding virtual functions from base classes
public:
- void print(const print_context & c, unsigned level = 0) const;
bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
+
+ // 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);
/** This class represents the tensor of antisymmetric su(3) structure
* constants. */
{
GINAC_DECLARE_REGISTERED_CLASS(su3f, tensor)
- // functions overriding virtual functions from bases classes
+ // functions overriding virtual functions from base classes
public:
- void print(const print_context & c, unsigned level = 0) const;
ex eval_indexed(const basic & i) const;
bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
+
+ // non-virtual functions in this class
+protected:
+ unsigned return_type() const { return return_types::commutative; }
+ 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);
/** This class represents the tensor of symmetric su(3) structure constants. */
class su3d : public tensor
{
GINAC_DECLARE_REGISTERED_CLASS(su3d, tensor)
- // functions overriding virtual functions from bases classes
+ // functions overriding virtual functions from base classes
public:
- void print(const print_context & c, unsigned level = 0) const;
ex eval_indexed(const basic & i) const;
bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
+
+ // non-virtual functions in this class
+protected:
+ unsigned return_type() const { return return_types::commutative; }
+ 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
-/** Return the color object handled by an ex. Deprecated: use ex_to<color>().
- * This is unsafe: you need to check the type first. */
-inline const color &ex_to_color(const ex &e)
-{
- return static_cast<const color &>(*e.bp);
-}
-
-/** Specialization of is_exactly_a<color>(obj) for color objects. */
-template<> inline bool is_exactly_a<color>(const basic & obj)
-{
- return obj.tinfo()==TINFO_color;
-}
-
/** Create the su(3) unity element. This is an indexed object, although it
* has no indices.
*
/** This returns the linear combination d.a.b.c+I*f.a.b.c. */
ex color_h(const ex & a, const ex & b, const ex & c);
+/** Calculate color traces over the specified set of representation labels.
+ *
+ * @param e Expression to take the trace of
+ * @param rls Set of representation labels */
+ex color_trace(const ex & e, const std::set<unsigned char> & rls);
+
+/** Calculate color traces over the specified list of representation labels.
+ *
+ * @param e Expression to take the trace of
+ * @param rll List of representation labels */
+ex color_trace(const ex & e, const lst & rll);
+
/** Calculate the trace of an expression containing color objects with a
* specified representation label.
*
* @param rl Representation label */
ex color_trace(const ex & e, unsigned char rl = 0);
-
} // namespace GiNaC
-#endif // ndef __GINAC_COLOR_H__
+#endif // ndef GINAC_COLOR_H
git://www.ginac.de / ginac.git / blobdiff