https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769839#M535 hi everyone,<DIV></DIV><DIV>I am trying to solve abanded sparse matrix symmetric (you can see it in the attachment).</DIV><DIV></DIV><DIV>Do you know if there is some lapack or blas libriries in fortra 90\\95 to solve it?</DIV><DIV></DIV><DIV>thanks in advance for any help.</DIV> Mon, 04 Apr 2011 14:44:13 GMT diedro 2011-04-04T14:44:13Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769839#M535 hi everyone,<DIV></DIV><DIV>I am trying to solve abanded sparse matrix symmetric (you can see it in the attachment).</DIV><DIV></DIV><DIV>Do you know if there is some lapack or blas libriries in fortra 90\\95 to solve it?</DIV><DIV></DIV><DIV>thanks in advance for any help.</DIV> Mon, 04 Apr 2011 14:44:13 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769839#M535 diedro 2011-04-04T14:44:13Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769840#M536 Hi,<DIV>You could solve you problem using LAPACK functionality (lu decomposition for example)if you set your matrix in banded format or by PARDISO functionality if you set it in sparse format.</DIV><DIV>With best regards,</DIV><DIV>Alexander Kalinkin </DIV> Mon, 04 Apr 2011 15:06:56 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769840#M536 Alexander_K_Intel2 2011-04-04T15:06:56Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769841#M537 hi,<DIV>thank you very much</DIV><DIV></DIV><DIV>as you can see from the attacment my matrix is both symmetric and sparse, what do you suggest? any subs?</DIV><DIV></DIV><DIV>thanks</DIV> Mon, 04 Apr 2011 16:16:53 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769841#M537 diedro 2011-04-04T16:16:53Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769842#M538 you can c<SPAN style="font-family: verdana, sans-serif;">onvert this matrix to the sparse representation of the CSR format ( e.g. You can use<A href="http://software.intel.com/sites/products/documentation/hpc/composerxe/en-us/mklxe/mkl_manual_win_mac/bla/functn_mkl_ddnscsr.htm#functn_mkl_ddnscsr">mkl_?dnscsr</A>routine for that) and then use PARDISO routine for solving this system.</SPAN><DIV>/gf<BR /><DIV></DIV></DIV> Mon, 04 Apr 2011 17:54:18 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769842#M538 Gennady_F_Intel 2011-04-04T17:54:18Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769843#M539 hi,<DIV></DIV><DIV>I have seen that my matrix is also symmetric and banded, moreover I could have a large number of cell.</DIV><DIV></DIV><DIV>Do yoy think that there is some libraries in mkl (lapack..) to solve the system with theConjugate Gradient Method?</DIV><DIV></DIV><DIV>Thanks a lot</DIV><DIV></DIV><DIV></DIV> Tue, 05 Apr 2011 11:39:47 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769843#M539 diedro 2011-04-05T11:39:47Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769844#M540 Hi,<DIV>Actually, CG is combination of matrix-vector multiplication and scalar product of two vectors so it could be realized by several call to BLAS routines. But why you want to solve your system by CG? Why you don't want to use direct LAPACK or PARDISO solvers?</DIV><DIV>With best regards,</DIV><DIV>Alexander Kalinkin</DIV> Tue, 05 Apr 2011 13:58:25 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/banded-sparse-matrix-symmetric/m-p/769844#M540 Alexander_K_Intel2 2011-04-05T13:58:25Z