# API reference

The solver guides explain mathematical assumptions and usage. These pages are
generated from the installed source and are the authoritative signature and
field reference.

```{toctree}
:maxdepth: 1

api/operators
api/direct
api/elliptic
api/krylov
api/pcg
api/fixed_point
api/preconditioners
api/implicit
api/autodiff
api/native
```