/usr/include/SyFi/symbol_factory.h is in libsyfi1.0-dev 1.0.0.dfsg-1.2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | // Copyright (C) 2006-2009 Kent-Andre Mardal and Simula Research Laboratory
//
// This file is part of SyFi.
//
// SyFi is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// SyFi is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SyFi. If not, see <http://www.gnu.org/licenses/>.
#ifndef SYMBOL_FACTORY_IS_INCLUDED
#define SYMBOL_FACTORY_IS_INCLUDED
#include <string>
#include <ginac/ginac.h>
namespace SyFi
{
// TODO: make a class SymbolSpace or something
/*
class SpaceSymbols
{
public:
SpaceSymbols(int nsd_, const std::string & base_name);
int nsd() const;
GiNaC::symbol x(int i) const;
GiNaC::symbol t() const;
};
ex diff(e, i, ss=default_ss, ss2=default_ss2);
ex div(e, ss=default_ss, ss2=default_ss2);
ex grad(e, ss=default_ss, ss2=default_ss2);
*/
// Initialize global variables of SyFi
void initSyFi(unsigned int nsd);
// spacial variables, used by differential operators
extern unsigned int nsd;
extern GiNaC::symbol x;
extern GiNaC::symbol y;
extern GiNaC::symbol z;
extern GiNaC::symbol t;
extern GiNaC::lst p;
// utility symbols
extern GiNaC::symbol infinity;
extern GiNaC::symbol DUMMY;
// ===== symbol factory
// TODO: is it useful to make a singleton for this?
bool symbol_exists(const std::string & name);
// TODO: we don't need the const & ?
const GiNaC::symbol & get_symbol(const std::string & name);
const GiNaC::symbol & isymb(const std::string & a, int b);
const GiNaC::symbol & isymb(const std::string & a, int b, int c);
GiNaC::ex get_symbolic_vector(int m, const std::string & basename);
GiNaC::ex get_symbolic_matrix(int m, int n, const std::string & basename);
} // namespace SyFi
#endif
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