X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fclifford.h;h=efb9dd6652b49d6a24268faaf3e7ce5bdf6b5a5b;hp=18ef03c2209fd073778c90b9e9d1644a392e7820;hb=58491538f7362529b3eaa1bcffcab3e9c0f0d049;hpb=79ad926d8a937c44278b8466966c9a2e9f2ee2f0 diff --git a/ginac/clifford.h b/ginac/clifford.h index 18ef03c2..efb9dd66 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) 1999-2005 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2008 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 @@ -41,57 +41,51 @@ 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; } - unsigned return_type_tinfo() const { return TINFO_clifford + representation_label; } - + 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; } ex op(size_t i) const; ex & let_op(size_t i); - ex subs(const exmap & m, unsigned options = 0) const { clifford c = ex_to(inherited::subs(m, options)); c.metric_subs(m, options); return c;} - ex subs(const lst & ls, const lst & lr, unsigned options = 0) const { clifford c = ex_to(ex(*this).subs(ls, lr, options)); c.metric_subs(ls, lr, options); return c;} - ex subs(const ex & e, unsigned options = 0) const{ clifford c = ex_to(ex(*this).subs(e, options)); c.metric_subs(e, options); return c;}; + ex subs(const exmap & m, unsigned options = 0) const; protected: void do_print_dflt(const print_dflt & c, unsigned level) const; void do_print_latex(const print_latex & c, unsigned level) const; - void metric_subs(const exmap & m, unsigned options = 0) { metric = metric.subs(m, options); } - void metric_subs(const lst & ls, const lst & lr, unsigned options = 0) { metric = metric.subs(ls, lr, options); } - void metric_subs(const ex & e, unsigned options = 0) { metric = metric.subs(e, options); } // member variables 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 @@ -103,6 +97,7 @@ 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). */ @@ -110,10 +105,6 @@ class cliffordunit : public tensor { GINAC_DECLARE_REGISTERED_CLASS(cliffordunit, tensor) - // other constructors -protected: - cliffordunit(unsigned ti) : inherited(ti) {} - // functions overriding virtual functions from base classes public: bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; @@ -139,6 +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 @@ -155,6 +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 @@ -171,6 +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 @@ -187,14 +181,18 @@ 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 -/** Specialization of is_exactly_a(obj) for clifford objects. */ -template<> inline bool is_exactly_a(const basic & obj) +/** 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 obj.tinfo()==TINFO_clifford; + return *(ti.tinfo) == typeid(clifford); } /** Create a Clifford unity object. @@ -209,7 +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. * @@ -320,7 +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 @@ -348,9 +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. @@ -359,9 +356,8 @@ 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