First, I’ve wrote some source code, #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/triangular.hpp> #include <boost/numeric/ublas/vector.hpp> #include <boost/numeric/ublas/lu.hpp> #include <boost/numeric/ublas/io.hpp> // calc inverted-matrix ublas::matrix<double> mat_lu(lc_param); ublas::matrix<double> lc_conj; ublas::permutation_matrix<> lu_exc(lc_param.size1()); lc_conj = ublas::identity_matrix<double>(lc_param.size1()); ublas::lu_factorize(mat_lu, lu_exc); ublas::lu_substitute(mat_lu, lu_exc, lc_conj); and gcc 4.1.2 arises error, cc -Wall -Wextra -g -I./ -I../ -o hvltest.o -c hvltest.cc /usr/include/boost/numeric/ublas/lu.hpp: In function ‘typename M::size_type boost::numeric::ublas::lu_factorize(M&, PM&) […]