mkl_pardiso_pivot
mkl_pardiso_pivot
Replaces routine which handles PARDISO pivots with user-defined routine.
Intel® oneAPI Math Kernel Library
Syntax
void
mkl_pardiso_pivot
(
const
void *
ai
,
void
*
bi
,
const
void
*
eps
);
Include Files
- mkl.h
Description
The PARDISO determines that a diagonal element
mkl_pardiso_pivot
routine allows you to handle diagonal elements which arise during numerical factorization that are zero or near zero. By default, Intel® oneAPI Math Kernel Library
bi
is a pivot if bi
< eps
, and if so, replaces it with eps
. But you can provide your own routine to modify the resulting factorized matrix in case there are small elements on the diagonal during the factorization step. To use this routine, you must set to 1 before the main
iparm
[55]pardiso
loop.Input Parameters
- ai
- Diagonal element of initial matrix corresponding to pivot element.
- bi
- Diagonal element of factorized matrix that could be chosen as a pivot element.
- eps
- Scalar to compare with diagonal of factorized matrix. On input equal to parameter described by.iparm[9]
Output Parameters
- bi
- In case element is chosen as a pivot, value with which to replace the pivot.