5 const std::vector<dcomponent>::iterator mat_data_end =mat.
data.end();
6 for(std::vector<dcomponent>::iterator it=mat.
data.begin(); it!=mat_data_end; it++){
_dgsmatrix operator*(const double &d, const _dgsmatrix &mat)
(DO NOT USE) Smart-temporary Real Double-precision General Sparse Matrix Class
std::vector< dcomponent > data
matrix data