#include <iostream>
#include <givaro/modular.h>
int main (int argc, char **argv)
{
if (argc != 4) {
cerr << "Usage: solve <matrix-file-in-supported-format> <output-file> <p>" << endl;
return 0;
}
srand48( BaseTimer::seed() );
std::ifstream input (argv[1]);
if (!input) { cerr << "Error opening matrix file " << argv[1] << endl; return -1; }
std::ofstream nsb;
nsb.open (argv[2], std::ofstream::out);
if (!nsb) { cerr << "Error opening nullspace output file " << argv[2] << endl; return -1; }
cout<<"Computation is done over Z/("<<atoi(argv[3])<<")"<<endl;
typedef Givaro::Modular<int64_t> Field;
double q = atof(argv[3]);
typedef DenseVector<Field> DenseVector ;
Field F(q);
SparseMatrix<Field> A (ms);
cout << "A is " << A.rowdim() << " by " << A.coldim() << endl;
if (A.rowdim() <= 20 && A.coldim() <= 20) A.write(std::cerr << "A:=",Tag::FileFormat::Maple) << ';' << std::endl;
Timer chrono;
chrono.clear();
chrono.start();
GD.
nullspacebasisin(N, A);
chrono.stop();
N.
write(nsb) << std::endl;
std::cout << "CPU time (seconds): " << chrono.usertime() << std::endl<<std::endl;;
#if 0
std::cout << "Blackbox" << std::endl;
chrono.clear();
chrono.start();
chrono.stop();
std::cout << "(Wiedemann) Solution is [";
for(DenseVector::const_iterator it=X.begin();it != X.end(); ++it)
F.
write(cout, *it) <<
" ";
std::cout << "]" << std::endl;
std::cout << "CPU time (seconds): " << chrono.usertime() << std::endl<<std::endl;;
#endif
#if 0
std::cout << "Lanczos" << std::endl;
chrono.clear();
chrono.start();
chrono.stop();
std::cout << "(Lanczos) Solution is [";
for(DenseVector::const_iterator it=X.begin();it != X.end(); ++it)
F.
write(cout, *it) <<
" ";
std::cout << "]" << std::endl;
std::cout << "CPU time (seconds): " << chrono.usertime() << std::endl<< std::endl;
std::cout << "Block Lanczos" << std::endl;
MBL.preconditioner(Specifier::FULL_DIAGONAL);
chrono.clear();
chrono.start();
chrono.stop();
std::cout << "(Block Lanczos) Solution is [";
for(DenseVector::const_iterator it=X.begin();it != X.end(); ++it)
F.
write(cout, *it) <<
" ";
std::cout << "]" << std::endl;
std::cout << "CPU time (seconds): " << chrono.usertime() << std::endl<< std::endl;
#endif
return 0;
}