slepc-3.20.1 2023-11-27
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# FNRationalGetNumerator

Gets the parameters that define the numerator of the rational function.

### Synopsis

    #include "slepcfn.h"
    PetscErrorCode FNRationalGetNumerator(FN fn,PetscInt *np,PetscScalar *pcoeff[])

Not Collective

### Input Parameter

| fn | - the math function context

### Output Parameters

| np | - number of coefficients
| pcoeff | - coefficients (array of scalar values, length nq)

### Notes

The values passed by user with FNRationalSetNumerator() are returned (or null pointers otherwise). The pcoeff array should be freed by the user when no longer needed.

### See Also

FNRationalSetNumerator()

### Level

intermediate

### 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