mirror of
https://github.com/triqs/dft_tools
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76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#include "./common.hpp"
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#include "./src/array.hpp"
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#include "./src/vector.hpp"
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#include "./src/matrix.hpp"
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#include "./src/linalg/eigenelements.hpp"
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#include <iostream>
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using namespace triqs::arrays;
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using namespace triqs::arrays::linalg;
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int main(int argc, char **argv) {
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matrix<double> A(3,3);
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for (int i =0; i<3; ++i)
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for (int j=0; j<=i; ++j)
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{ A(i,j) = (i>j ? i+2*j : i-j); A(j,i) = A(i,j);}
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std::cerr<<"A = "<<A<<std::endl;
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eigenelements_worker< matrix_view <double>, true> w (A());
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w.invoke();
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std::cout<<"A = "<<A<<std::endl;
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std::cout<<" vectors = "<< w.values()<<std::endl;
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std::cout<<" values = "<< w.vectors()<<std::endl;
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A() =0;
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A(0,1) = 1;
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A(1,0) = 1;
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A(2,2) = 8;
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A(0,2) = 2;
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A(2,0) = 2;
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std::cout<<"A = "<<A<<std::endl;
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std::cout<<" values = "<< eigenelements(A(),true).first<<std::endl;
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std::cout<<" vectors = "<< eigenelements(A(),true).second<<std::endl;
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A() =0;
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A(0,1) = 1;
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A(1,0) = 1;
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A(2,2) = 8;
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std::cout<<"A = "<<A<<std::endl;
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std::cout<<" vectors = "<< eigenelements(A(),true).second<<std::endl;
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std::cout<<" values = "<< eigenelements(A(),true).first<<std::endl;
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std::cout<<"A = "<<A<<std::endl;
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return 0;
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}
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