# User guide

Concepts behind the public API — how the exponential-family structure, EM
fitters, divergences, and finance toolkit fit together. For executable demos
see the {doc}`tutorials <../tutorials/index>`; for class reference see the
{doc}`API <../api/index>`.

```{toctree}
:maxdepth: 1

distributions
exponential_family
em_fitting
divergences
finance
```