Nestedsums library: multiple_polylog.h Source File

00001 00008 /* 00009 * Copyright (C) 2001 Stefan Weinzierl 00010 * 00011 * This program is free software; you can redistribute it and/or modify 00012 * it under the terms of the GNU General Public License as published by 00013 * the Free Software Foundation; either version 2 of the License, or 00014 * (at your option) any later version. 00015 * 00016 * This program is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00019 * GNU General Public License for more details. 00020 * 00021 * You should have received a copy of the GNU General Public License 00022 * along with this program; if not, write to the Free Software 00023 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00024 */ 00025 00026 #ifndef __NESTEDSUMS_MULTIPLE_POLYLOG_H__ 00027 #define __NESTEDSUMS_MULTIPLE_POLYLOG_H__ 00028 00029 #include "ginac/ginac.h" 00030 00031 namespace nestedsums { 00032 00034 00053 class multiple_polylog : public virtual Zsum 00054 { 00055 GINAC_DECLARE_REGISTERED_CLASS(multiple_polylog, Zsum) 00056 00057 // ctors 00058 public: 00059 explicit multiple_polylog(const GiNaC::ex & llc); 00060 00061 // functions overriding virtual functions from bases classes 00062 public: 00063 void archive(GiNaC::archive_node &node) const; 00064 void read_archive(const GiNaC::archive_node &node, GiNaC::lst &sym_lst); 00065 00066 void print(const GiNaC::print_context & c, unsigned level = 0) const; 00067 GiNaC::ex eval(int level = 0) const; 00068 00069 // new virtual functions 00070 public: 00071 virtual GiNaC::ex eval_approx(int level = 0) const; 00072 }; 00073 00074 GINAC_DECLARE_UNARCHIVER(multiple_polylog); 00075 00081 inline GiNaC::ex create_multiple_polylog(const GiNaC::ex & llc) 00082 { 00083 return (new multiple_polylog(llc))->setflag(GiNaC::status_flags::dynallocated); 00084 } 00085 00086 GiNaC::ex eval_multiple_polylog_approx(const GiNaC::ex & expr); 00087 00088 } // namespace nestedsums 00089 00090 namespace GiNaC { 00091 00092 // template specialization 00093 template<> inline const nestedsums::multiple_polylog &ex_to<nestedsums::multiple_polylog>(const ex &e) 00094 { 00095 return dynamic_cast<const nestedsums::multiple_polylog &>(*e.bp); 00096 } 00097 00098 } // end namespace GiNaC 00099 00100 #endif // ndef __NESTEDSUMS_MULTIPLE_POLYLOG_H__