slepc-3.17.1 2022-04-11
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Computes the value of the derivative f'(x) for a given x.


#include "slepcfn.h" 
PetscErrorCode FNEvaluateDerivative(FN fn,PetscScalar x,PetscScalar *y)
Not Collective

Input Parameters

fn  - the math function context
x  - the value where the derivative must be evaluated

Output Parameter

y  - the result of f'(x)


Scaling factors are taken into account, so the actual derivative evaluation will return alpha*beta*f'(alpha*x).

See Also


Location: src/sys/classes/fn/interface/fnbasic.c
Index of all FN routines
Table of Contents for all manual pages
Index of all manual pages