X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fclifford.h;h=ea34a9b49c2f0980d4112c21377b58d8957dbe63;hp=48d28139f5cfdf84c486175f03662e182f761c02;hb=be207191d6230add6ddd6aec2ac0b12a0e302f37;hpb=3ac17e18ada69428fe170c10abcc5f33a30f0676 diff --git a/ginac/clifford.h b/ginac/clifford.h index 48d28139..ea34a9b4 100644 --- a/ginac/clifford.h +++ b/ginac/clifford.h @@ -3,7 +3,7 @@ * Interface to GiNaC's clifford algebra (Dirac gamma) objects. */ /* - * GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2015 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 @@ -20,8 +20,8 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#ifndef __GINAC_CLIFFORD_H__ -#define __GINAC_CLIFFORD_H__ +#ifndef GINAC_CLIFFORD_H +#define GINAC_CLIFFORD_H #include "indexed.h" #include "tensor.h" @@ -32,7 +32,6 @@ namespace GiNaC { - /** This class holds an object representing an element of the Clifford * algebra (the Dirac gamma matrices). These objects only carry Lorentz * indices. Spinor indices are hidden. A representation label (an unsigned @@ -41,34 +40,33 @@ namespace GiNaC { class clifford : public indexed { GINAC_DECLARE_REGISTERED_CLASS(clifford, indexed) - // other constructors public: - clifford(const ex & b, unsigned char rl = 0, bool anticommut = false); - clifford(const ex & b, const ex & mu, const ex & metr, unsigned char rl = 0, bool anticommut = false, int comm_sign = -1); + clifford(const ex & b, unsigned char rl = 0); + clifford(const ex & b, const ex & mu, const ex & metr, unsigned char rl = 0, int comm_sign = -1); // internal constructors - clifford(unsigned char rl, const ex & metr, bool anticommut, int comm_sign, const exvector & v, bool discardable = false); - clifford(unsigned char rl, const ex & metr, bool anticommut, int comm_sign, std::auto_ptr vp); + clifford(unsigned char rl, const ex & metr, int comm_sign, const exvector & v, bool discardable = false); + clifford(unsigned char rl, const ex & metr, int comm_sign, std::auto_ptr vp); // functions overriding virtual functions from base classes public: unsigned precedence() const { return 65; } + void archive(archive_node& n) const; + void read_archive(const archive_node& n, lst& sym_lst); protected: ex eval_ncmul(const exvector & v) const; bool match_same_type(const basic & other) const; ex thiscontainer(const exvector & v) const; ex thiscontainer(std::auto_ptr vp) const; unsigned return_type() const { return return_types::noncommutative; } - const basic* return_type_tinfo() const { return this; } - + return_type_t return_type_tinfo() const; // non-virtual functions in this class public: unsigned char get_representation_label() const { return representation_label; } ex get_metric() const { return metric; } virtual ex get_metric(const ex & i, const ex & j, bool symmetrised = false) const; bool same_metric(const ex & other) const; - bool is_anticommuting() const { return anticommuting; } //**< See the member variable anticommuting */ int get_commutator_sign() const { return commutator_sign; } //**< See the member variable commutator_sign */ inline size_t nops() const {return inherited::nops() + 1; } @@ -84,9 +82,9 @@ protected: protected: unsigned char representation_label; /**< Representation label to distinguish independent spin lines */ ex metric; /**< Metric of the space, all constructors make it an indexed object */ - bool anticommuting; /**< Simplifications for anticommuting units is much simpler and we need this info readily available */ int commutator_sign; /**< It is the sign in the definition e~i e~j +/- e~j e~i = B(i, j) + B(j, i)*/ }; +GINAC_DECLARE_UNARCHIVER(clifford); /** This class represents the Clifford algebra unity element. */ class diracone : public tensor @@ -98,6 +96,7 @@ 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(diracone); /** This class represents the Clifford algebra generators (units). */ @@ -105,10 +104,6 @@ class cliffordunit : public tensor { GINAC_DECLARE_REGISTERED_CLASS(cliffordunit, tensor) - // other constructors -protected: - cliffordunit(tinfo_t ti) : inherited(ti) {} - // functions overriding virtual functions from base classes public: bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; @@ -118,6 +113,7 @@ 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(cliffordunit); /** This class represents the Dirac gamma Lorentz vector. */ @@ -134,6 +130,7 @@ 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(diracgamma); /** This class represents the Dirac gamma5 object which anticommutates with @@ -150,6 +147,7 @@ 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(diracgamma5); /** This class represents the Dirac gammaL object which behaves like @@ -166,6 +164,7 @@ 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(diracgammaL); /** This class represents the Dirac gammaL object which behaves like @@ -182,10 +181,20 @@ 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(diracgammaR); // global functions +/** Check whether a given return_type_t object (as returned by return_type_tinfo() + * is that of a clifford object (with an arbitrary representation label). + * + * @param ti tinfo key */ +inline bool is_clifford_tinfo(const return_type_t& ti) +{ + return *(ti.tinfo) == typeid(clifford); +} + /** Create a Clifford unity object. * * @param rl Representation label @@ -198,7 +207,7 @@ ex dirac_ONE(unsigned char rl = 0); * @param metr Metric (should be indexed, tensmetric or a derived class, or a matrix) * @param rl Representation label * @return newly constructed Clifford unit object */ -ex clifford_unit(const ex & mu, const ex & metr, unsigned char rl = 0, bool anticommuting = false); +ex clifford_unit(const ex & mu, const ex & metr, unsigned char rl = 0); /** Create a Dirac gamma object. * @@ -293,7 +302,7 @@ ex remove_dirac_ONE(const ex & e, unsigned char rl = 0, unsigned options = 0); * * @param e Expression to be processed * @ignore_ONE defines if clifford_ONE should be ignored in the search*/ -char clifford_max_label(const ex & e, bool ignore_ONE = false); +int clifford_max_label(const ex & e, bool ignore_ONE = false); /** Calculation of the norm in the Clifford algebra. */ ex clifford_norm(const ex & e); @@ -309,7 +318,7 @@ ex clifford_inverse(const ex & e); * @param rl Representation label * @param e Clifford unit object * @return Clifford vector with given components */ -ex lst_to_clifford(const ex & v, const ex & mu, const ex & metr, unsigned char rl = 0, bool anticommuting = false); +ex lst_to_clifford(const ex & v, const ex & mu, const ex & metr, unsigned char rl = 0); ex lst_to_clifford(const ex & v, const ex & e); /** An inverse function to lst_to_clifford(). For given Clifford vector extracts @@ -337,9 +346,8 @@ lst clifford_to_lst(const ex & e, const ex & c, bool algebraic=true); * @param v Vector to be transformed * @param G Metric of the surrounding space, may be a Clifford unit then the next parameter is ignored * @param rl Representation label - * @param anticommuting indicates if Clifford units anticommutes * @return List of components of the transformed vector*/ -ex clifford_moebius_map(const ex & a, const ex & b, const ex & c, const ex & d, const ex & v, const ex & G, unsigned char rl = 0, bool anticommuting = false); +ex clifford_moebius_map(const ex & a, const ex & b, const ex & c, const ex & d, const ex & v, const ex & G, unsigned char rl = 0); /** The second form of Moebius transformations defined by a 2x2 Clifford matrix M * This function takes the transformation matrix M as a single entity. @@ -348,10 +356,9 @@ ex clifford_moebius_map(const ex & a, const ex & b, const ex & c, const ex & d, * @param v Vector to be transformed * @param G Metric of the surrounding space, may be a Clifford unit then the next parameter is ignored * @param rl Representation label - * @param anticommuting indicates if Clifford units anticommutes * @return List of components of the transformed vector*/ -ex clifford_moebius_map(const ex & M, const ex & v, const ex & G, unsigned char rl = 0, bool anticommuting = false); +ex clifford_moebius_map(const ex & M, const ex & v, const ex & G, unsigned char rl = 0); } // namespace GiNaC -#endif // ndef __GINAC_CLIFFORD_H__ +#endif // ndef GINAC_CLIFFORD_H