slepc-3.22.1 2024-10-28
DSPEPSetCoefficients
Sets the polynomial basis coefficients for a DSPEP.
Synopsis
#include "slepcds.h"
PetscErrorCode DSPEPSetCoefficients(DS ds,PetscReal pbc[])
Logically Collective
Input Parameters
| ds | - the direct solver context
|
| pbc | - the polynomial basis coefficients
|
Notes
This function is required only in the case of a polynomial specified in a
non-monomial basis, to provide the coefficients that will be used
during the linearization, multiplying the identity blocks on the three main
diagonal blocks. Depending on the polynomial basis (Chebyshev, Legendre, ...)
the coefficients must be different.
There must be a total of 3*(d+1) coefficients, where d is the degree of the
polynomial. The coefficients are arranged in three groups, alpha, beta, and
gamma, according to the definition of the three-term recurrence. In the case
of the monomial basis, alpha=1 and beta=gamma=0, in which case it is not
necessary to invoke this function.
See Also
DSPEPGetCoefficients(), DSPEPSetDegree()
Level
advanced
Location
src/sys/classes/ds/impls/pep/dspep.c
Index of all DS routines
Table of Contents for all manual pages
Index of all manual pages