slepc-3.22.1 2024-10-28
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 nq-1.
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^2-3 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