mirror of
https://github.com/triqs/dft_tools
synced 2024-11-01 19:53:45 +01:00
61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011 by O. Parcollet
|
||
|
|
*
|
||
|
|
* TRIQS is free software: you can redistribute it and/or modify it under the
|
||
|
|
* terms of the GNU General Public License as published by the Free Software
|
||
|
|
* Foundation, either version 3 of the License, or (at your option) any later
|
||
|
|
* version.
|
||
|
|
*
|
||
|
|
* TRIQS 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 General Public License for more
|
||
|
|
* details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along with
|
||
|
|
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
#include "./common.hpp"
|
||
|
|
#include "./src/matrix.hpp"
|
||
|
|
#include "./src/asserts.hpp"
|
||
|
|
#include "./src/linalg/matmul.hpp"
|
||
|
|
#include "./src/linalg/eigenelements.hpp"
|
||
|
|
#include "./src/blas_lapack/stev.hpp"
|
||
|
|
#include <triqs/arrays/asserts.hpp>
|
||
|
|
#include <iostream>
|
||
|
|
using namespace triqs::arrays;
|
||
|
|
using namespace triqs;
|
||
|
|
|
||
|
|
int main(int argc, char **argv) {
|
||
|
|
|
||
|
|
arrays::vector<double> D (5), DD(4);
|
||
|
|
for (size_t i=0; i<5; ++i) {D(i) = 3.2*i+2.3;}
|
||
|
|
for (size_t i=0; i<4; ++i) {DD(i) = 2.4*(i+1.82) + 0.78;}
|
||
|
|
|
||
|
|
auto R = range(0,5);
|
||
|
|
|
||
|
|
blas::tridiag_worker w(10);
|
||
|
|
w(D,DD);
|
||
|
|
std::cerr<<" values = "<< w.values()<<std::endl;
|
||
|
|
std::cerr<<" vectors = "<< w.vectors()(R,R)<<std::endl;
|
||
|
|
|
||
|
|
//check
|
||
|
|
matrix<double> A(5,5); A()=0;
|
||
|
|
for (size_t i=0; i<5; ++i) A(i,i) = D(i);
|
||
|
|
for (size_t i=0; i<4; ++i) { A(i,i+1) = DD(i); A(i+1,i) = DD(i);}
|
||
|
|
|
||
|
|
std::cerr<<"A = "<<A<<std::endl;
|
||
|
|
linalg::eigenelements_worker< matrix_view <double>, true> w2 (A());
|
||
|
|
w2.invoke();
|
||
|
|
std::cerr<<" check values = "<< w2.values()<<std::endl;
|
||
|
|
std::cerr<<" check vectors = "<< w2.vectors()<<std::endl;
|
||
|
|
|
||
|
|
assert_all_close(w.vectors()(R,R), w2.vectors(), 1.e-10);
|
||
|
|
assert_all_close(array_view<double,1>(w.values()), w2.values(), 1.e-10);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|