slepc3.20.1 20231127
FNRationalSetDenominator
Sets the parameters defining the denominator of the rational function.
Synopsis
#include "slepcfn.h"
PetscErrorCode FNRationalSetDenominator(FN fn,PetscInt nq,PetscScalar *qcoeff)
Logically Collective
Input Parameters
 fn   the math function context

 nq   number of coefficients

 qcoeff   coefficients (array of scalar values)

Notes
Let the rational function r(x) = p(x)/q(x), where p(x) and q(x) are polynomials.
This function provides the coefficients of the denominator q(x).
Hence, q(x) is of degree nq1.
If nq is zero, then the function is assumed to be polynomial, r(x) = p(x).
In polynomials, high order coefficients are stored in the first positions
of the array, e.g. to represent x^23 use {1,0,3}.
See Also
FNRationalSetNumerator(), FNRationalGetDenominator()
Level
intermediate
Location
src/sys/classes/fn/impls/rational/fnrational.c
Examples
src/nep/tutorials/ex42.c
src/nep/tutorials/nlevp/loaded_string.c
Index of all FN routines
Table of Contents for all manual pages
Index of all manual pages