slepc-3.7.4 2017-05-17
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# 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 on FN

### 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()

Location: src/sys/classes/fn/impls/rational/fnrational.c
Index of all FN routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/nep/examples/nlevp/loaded_string.c.html