Intel® Math Kernel Library 2018 Developer Reference - C
Replaces routine which handles Intel MKL PARDISO pivots with user-defined routine.
void mkl_pardiso_pivot (const void *ai, void *bi, const void *eps);
The mkl_pardiso_pivot routine allows you to handle diagonal elements which arise during numerical factorization that are zero or near zero. By default, Intel MKL PARDISO determines that a diagonal element 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 iparm[55] to 1 before the main pardiso loop.
Diagonal element of initial matrix corresponding to pivot element.
Diagonal element of factorized matrix that could be chosen as a pivot element.
Scalar to compare with diagonal of factorized matrix. On input equal to parameter described by iparm[9].
In case element is chosen as a pivot, value with which to replace the pivot.