https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/how-to-use-pardiso-to-solve-a-singular-matrix-problem/m-p/849670#M6478 <P><SPAN>PARDISO can only solve non-singular systems of linear equations. So PARDISO can not directly be used for solving rank-deficient problems.</SPAN></P> <P><SPAN>All the best</SPAN></P> <P><SPAN>Sergey</SPAN></P> Wed, 30 Jul 2008 06:35:18 GMT Sergey_K_Intel1 2008-07-30T06:35:18Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/how-to-use-pardiso-to-solve-a-singular-matrix-problem/m-p/849669#M6477 Hi, I want to use pardiso to solve a poisson equation with neumann boundary condition. <BR />for instance, Uxx=0 0<X>&lt;1, where partial(U)/parital(x)|x=0,1 equal to zero. <BR />the matrix is just like this :<BR /><BR />|1 -1 0 0 |<BR />|-1 2 -1 0 | <BR />|0 -1 2 -1 | <BR />|0 0 -1 1 |<BR /><BR />I know in MKL some possion pack can solve this problem. But I want to use paradiso because I intend to use it solve more complex problems. <BR /><BR />Does anyone to point me out how to use paradiso to solve this singular problem? <BR /><BR /><BR /></X> Sun, 27 Jul 2008 09:00:19 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/how-to-use-pardiso-to-solve-a-singular-matrix-problem/m-p/849669#M6477 smth 2008-07-27T09:00:19Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/how-to-use-pardiso-to-solve-a-singular-matrix-problem/m-p/849670#M6478 <P><SPAN>PARDISO can only solve non-singular systems of linear equations. So PARDISO can not directly be used for solving rank-deficient problems.</SPAN></P> <P><SPAN>All the best</SPAN></P> <P><SPAN>Sergey</SPAN></P> Wed, 30 Jul 2008 06:35:18 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/how-to-use-pardiso-to-solve-a-singular-matrix-problem/m-p/849670#M6478 Sergey_K_Intel1 2008-07-30T06:35:18Z