https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Set-boundary-condition-on-a-singular-matrix/m-p/1154888#M27475 <P>Hey folks,</P> <P>i am a newbie in using the MKL.</P> <P>If I build up a stiffness matrix on a FEM problem the stiffness matrix is singular. To solve a problem - no matter which one - you have to make the siffness matrix nonsingular/regular by inserting a boundary condition on the equation A x = b.</P> <P>Does somebody of you know if there is a pre-written *.f or *.f90 routine for inserting a boundary condition in a&nbsp; CSR format of the BLAS/PARDISO package?</P> <P>Do I have to write it by my own? :-)</P> <P>Thanks,</P> <P>Kons</P> <P>&nbsp;</P> Fri, 10 Nov 2017 12:22:42 GMT KonsMa85 2017-11-10T12:22:42Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Set-boundary-condition-on-a-singular-matrix/m-p/1154888#M27475 <P>Hey folks,</P> <P>i am a newbie in using the MKL.</P> <P>If I build up a stiffness matrix on a FEM problem the stiffness matrix is singular. To solve a problem - no matter which one - you have to make the siffness matrix nonsingular/regular by inserting a boundary condition on the equation A x = b.</P> <P>Does somebody of you know if there is a pre-written *.f or *.f90 routine for inserting a boundary condition in a&nbsp; CSR format of the BLAS/PARDISO package?</P> <P>Do I have to write it by my own? :-)</P> <P>Thanks,</P> <P>Kons</P> <P>&nbsp;</P> Fri, 10 Nov 2017 12:22:42 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Set-boundary-condition-on-a-singular-matrix/m-p/1154888#M27475 KonsMa85 2017-11-10T12:22:42Z