topic Dear Alex, in Intel® oneAPI Math Kernel Library

selected inversion with pardiso

Alessandro_M_ — Tue, 21 Oct 2014 09:23:36 GMT

Hi, I would like to obtain some elements of the inverse matrix, based on a user selection of the indexes. Is it possible to use the selected inversion process of Pardiso?

Acuattly, I tried to play with iparm(36) and iparm(37) with "local (internal) PARDISO version is : 103911000", but I obtain an error.

Hi Alessandro,

Alexander_K_Intel2 — Wed, 22 Oct 2014 05:51:26 GMT

Hi Alessandro,

Current version of MKL doesn't support such functionality. But can i ask you the reason of such request? Probably I can provide advice, how it can be calculated based on current feature set.

Thanks,

Alex

Dear Alex,

Alessandro_M_ — Wed, 22 Oct 2014 09:33:08 GMT

Dear Alex,

Thank you. I have to invert a very sparse matrix representing a sort of base projection. For physical reasons I know the sparsity pattern of the inverse, and I need the elements of the inverse for further elaboration. My question is if is there a method faster than multiply the inverse matrix with N vectors having only one unitary element.

Best regards,

Alessandro