## 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.

Beginner - Basic usage
| FN | FNDestroy | FNType
FNCreate | FNSetFromOptions | FNView
Intermediate - Setting options for algorithms and data structures
| FNEvaluateDerivative | FNGetParameters | FNSetParameters
FNEvaluateFunction | FNGetType | FNSetType
Advanced - Setting more advanced options and customization
| FNAppendOptionsPrefix | FNRegister | FNSetOptionsPrefix
FNGetOptionsPrefix | FNRegisterAll |
Developer - Interfaces intended primarily for library developers, not for typical applications programmers
| FNFinalizePackage | FNInitializePackage |
No deprecated routines

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