DSNEPSetComputeMatrixFunction#
Sets a user-provided subroutine to compute the matrices \(T(\lambda)\) or \(T'(\lambda)\).
Synopsis#
#include "slepcds.h"
PetscErrorCode DSNEPSetComputeMatrixFunction(DS ds,DSNEPMatrixFunctionFn *fun,void *ctx)
Logically Collective
Input Parameters#
ds - the direct solver context
fun - matrix function evaluation routine, see
DSNEPMatrixFunctionFnfor the calling sequencectx - a context pointer (the last parameter to the user function)
Note#
The result is computed as \(T(\lambda) = \sum_i E_i f_i(\lambda)\), and similarly
for the derivative, where \(E_i\) are the extra matrices, see DSMatType.
See Also#
DS: Direct Solver (or Dense System), DSNEPGetComputeMatrixFunction()
Level#
developer
Location#
Implementations#
DSNEPSetComputeMatrixFunction_NEP() in src/sys/classes/ds/impls/nep/dsnep.c
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