linbox
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/* -*- mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ // vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s /* * examples/valence.C * * Copyright (C) 2005, 2010 J-G Dumas * * This file is part of LinBox. * * LinBox is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 2 of * the License, or (at your option) any later version. * * LinBox 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with LinBox. If not, see * <http://www.gnu.org/licenses/>. */ //#include "linbox-config.h" #include <iostream> #include "linbox/field/modular.h" #include "linbox/blackbox/transpose.h" #include "linbox/blackbox/compose.h" #include "linbox/blackbox/sparse.h" #include "linbox/solutions/valence.h" #include "linbox/util/matrix-stream.h" using namespace LinBox; int main (int argc, char **argv) { commentator.setMaxDetailLevel (-1); commentator.setMaxDepth (-1); commentator.setReportStream (std::cerr); if (argc < 2 || argc > 3) { std::cerr << "Usage: valence <matrix-file-in-supported-format> [-ata|-aat]" << std::endl; return -1; } std::ifstream input (argv[1]); if (!input) { std::cerr << "Error opening matrix file " << argv[1] << std::endl; return -1; } PID_integer ZZ; MatrixStream< PID_integer > ms( ZZ, input ); typedef SparseMatrix<PID_integer> Blackbox; Blackbox A (ms); std::cout << "A is " << A.rowdim() << " by " << A.coldim() << std::endl; PID_integer::Element val_A; if (argc == 3) { Transpose<Blackbox> T(&A); if (strcmp(argv[2],"-aat")) { Compose< Transpose<Blackbox>, Blackbox > C (&T, &A); std::cout << "A^T A is " << C.rowdim() << " by " << C.coldim() << std::endl; valence(val_A, C); } else { Compose< Blackbox, Transpose<Blackbox> > C (&A, &T); std::cout << "A A^T is " << C.rowdim() << " by " << C.coldim() << std::endl; valence(val_A, C); } } else { if (A.rowdim() != A.coldim()) { std::cerr << "Valence works only on square matrices, try either to change the dimension in the matrix file, or to compute the valence of A A^T or A^T A, via the -aat or -ata options." << std::endl; exit(0); } else valence (val_A, A); } std::cout << "Valence is " << val_A << std::endl; return 0; }