slepc-3.18.0 2022-10-01
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FNRationalSetNumerator

Sets the parameters defining the numerator of the rational function.

Synopsis

#include "slepcfn.h" 
PetscErrorCode FNRationalSetNumerator(FN fn,PetscInt np,PetscScalar *pcoeff)
Logically Collective on fn

Input Parameters

fn  - the math function context
np  - number of coefficients
pcoeff  - 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 numerator p(x). Hence, p(x) is of degree np-1. If np is zero, then the numerator is assumed to be p(x)=1.

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

FNRationalSetDenominator(), FNRationalGetNumerator()

Level

intermediate

Location

src/sys/classes/fn/impls/rational/fnrational.c

Examples

src/nep/tutorials/ex22.c.html
src/nep/tutorials/ex22f90.F90.html
src/nep/tutorials/ex27.c.html
src/nep/tutorials/ex27f90.F90.html
src/nep/tutorials/ex42.c.html
src/nep/tutorials/nlevp/gun.c.html
src/nep/tutorials/nlevp/loaded_string.c.html
src/mfn/tutorials/ex39.c.html


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