https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130421#M25558 <P>There are a couple of C examples which you find out into mklroot/examples/solverc/source folder.</P> Wed, 19 Sep 2018 05:28:13 GMT Gennady_F_Intel 2018-09-19T05:28:13Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130420#M25557 <P>Hi!<BR /> <BR /> I want to solve a system with mtype = -2, i.e. PAP' = LDL', using pardiso MKL.<BR /> <BR /> I have understood that the function pardiso_getdiag provides the diagonal of the initial and factorized system. However, I wonder if it is possible to obtain the diagonal of the D-matrix during the factorization? More precisely I want to be able to alter the diagonal elements of D which are close to zero (replace these with ones instead).</P> <P>The function mkl_pardiso_pivot is supposed to "allows you to handle diagonal elements which arise during numerical factorization that are zero or near zero". However, I have problems understanding what I am supposed to provide as input to the function. Is there any examples that can be found?</P> <P>I am using the fortran version of pardiso.<BR /> <BR /> Thanks in advance for the help!</P> <P>/Anna</P> Mon, 17 Sep 2018 06:41:00 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130420#M25557 Dalklint__Anna 2018-09-17T06:41:00Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130421#M25558 <P>There are a couple of C examples which you find out into mklroot/examples/solverc/source folder.</P> Wed, 19 Sep 2018 05:28:13 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130421#M25558 Gennady_F_Intel 2018-09-19T05:28:13Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130422#M25559 <P>Yes I have heard about that. However, I cannot seem to find these examples. I can only find a folder named "solverf", not "solverc". Is it possible for you to send them to me?</P> Wed, 19 Sep 2018 05:36:00 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Alter-elements-in-diagonal-of-D-matrix-during-the-LDL/m-p/1130422#M25559 Dalklint__Anna 2018-09-19T05:36:00Z