*
* 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
*
* 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
{
// Determinant of a sparse matrix that comes up in graph theory:
symbol x1("x1"), x2("x2"), x3("x3"), x4("x4"), x5("x5");
{
// Determinant of a sparse matrix that comes up in graph theory:
symbol x1("x1"), x2("x2"), x3("x3"), x4("x4"), x5("x5");