slepc-3.21.1 2024-04-26
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## Mathematical Function - FN

The FN package provides the functionality to represent a simple mathematical function such as an exponential, a polynomial or a rational function. This is used as a building block for defining the function associated to the nonlinear eigenproblem, as well as for specifying which function to use when computing the action of a matrix function on a vector.

Beginner - Basic usage
| FN | FNDestroy | FNType
FNCreate | FNSetFromOptions | FNView
Intermediate - Setting options for algorithms and data structures
| FNCombineGetChildren | FNGetType | FNRationalSetNumerator
FNCombineSetChildren | FNPhiGetIndex | FNSetMethod
FNEvaluateDerivative | FNPhiSetIndex | FNSetScale
FNEvaluateFunction | FNRationalGetDenominator | FNSetType
FNGetMethod | FNRationalGetNumerator | FNViewFromOptions
FNGetScale | FNRationalSetDenominator |
Advanced - Setting more advanced options and customization
| FNAppendOptionsPrefix | FNGetOptionsPrefix | FNRegisterAll
FNCombineType | FNGetParallel | FNSetOptionsPrefix
FNEvaluateFunctionMat | FNParallelType | FNSetParallel
FNEvaluateFunctionMatVec | FNRegister |
Developer - Interfaces intended primarily for library developers, not for typical applications programmers
| FNDuplicate | FNFinalizePackage | FNInitializePackage
No deprecated routines

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