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Uno v1.1.0 implements the following features:
- an **interface to the open-source linear solver [MUMPS](https://mumps-solver.org)**. Once installed, it can be selected via the command line option:
```console
-linear_solver MUMPS
```
- a new **funnel method** as a globalization strategy (= a strategy that accepts or rejects trial iterates). It was developed by David Kiessling (@david0oo)  and described in our latest [preprint](https://www.researchgate.net/publication/383660361). On the considered test instances, it performed at least better than the filter method, while being easier to implement. It can be selected via the command line option:
```console
-globalization_strategy funnel_method
```

Uno v1.0.0 allows combinations of the following strategies:
- constraint relaxation strategies: l1 relaxation and l1 feasibility restoration.
- subproblems: QP, LP and primal-dual barrier.
- globalization strategies: l1 merit function and filter method (with standard filter or nonmonotone filter).
- globalization mechanisms: line search and trust-region method.

Some combinations are at the moment not fully supported, namely barrier + trust-region (disabled) and l1 merit function + feasibility restoration (Uno issues a warning). This will be improved in later versions of Uno.

The only existing interface is to AMPL ([.nl files](https://en.wikipedia.org/wiki/Nl_(format))).