1 /** @file time_lw_Q.cpp
3 * Test Q from the paper "Comparison of Polynomial-Oriented CAS" by Robert H.
4 * Lewis and Michael Wester. */
7 * GiNaC Copyright (C) 1999-2007 Johannes Gutenberg University Mainz, Germany
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 static const bool do_test = true; // set to true in order to run this beast
28 static unsigned test()
30 // same matrix as in test P:
31 const unsigned n = 10;
32 matrix m(n*n+1,n*n+1);
33 for (unsigned i=1; i<=n*n; ++i)
35 for (unsigned i=1; i<=n*n; ++i)
38 for (unsigned i=1; i<=n*n; ++i)
40 m.set(n*n,i-1,n-(i-1)/n);
41 for(unsigned i=1; i<=n; ++i)
42 for (unsigned j=1; j<=n; ++j)
44 for (unsigned k=1; k<n; ++k)
45 m.set((i-1)*n+k-1,(j-1)*n+k,n+1-j);
47 symbol lambda("lambda");
48 ex cp = m.charpoly(lambda);
50 if (cp.coeff(lambda,96) != numeric("75287520")) {
51 clog << "characteristic polynomial miscalculated as " << cp << endl;
64 cout << "timing Lewis-Wester test Q (charpoly(P))" << flush;
65 clog << "-------Lewis-Wester test Q (charpoly(P)):" << endl;
69 // correct for very small times:
73 } while ((time=rolex.read())<0.1 && !result);
78 clog << "(no output)" << endl;
82 cout << time/count << 's' << endl;
84 cout << " disabled" << endl;
85 clog << "(no output)" << endl;