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 | ||