# A new solver for robustified non-linear least squares problems, with non-Euclidean variables

**URL:** <https://discourse.julialang.org/t/a-new-solver-for-robustified-non-linear-least-squares-problems-with-non-euclidean-variables/96085>\
**Category:** Optimization (Mathematical)\
**Created:** [March 14, 2023, 8:30pm UTC](https://discourse.julialang.org/t/a-new-solver-for-robustified-non-linear-least-squares-problems-with-non-euclidean-variables/96085 "2023-03-14T20:30:40Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![user664303](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/user664303/32/37843_2.png) [@user664303](https://discourse.julialang.org/u/user664303)\
**Post date:** [April 14, 2023, 7:52pm UTC](https://discourse.julialang.org/t/a-new-solver-for-robustified-non-linear-least-squares-problems-with-non-euclidean-variables/96085/4 "2023-04-14T19:52:12Z")

</div>

> [@kellertuer](#):
>
> I just saw rotations (SO(3) in your announcement, to you also have other non-Euclidean variables?

There are lower bounded, and upper & lower bounded variables, but I’m not sure how well they work in practice.

> [@kellertuer](#):
>
> There is a bunch of algorithms for Optimization on Manifolds (like SO(3)) in `Manopt.jl`

Do they support robustified least squares cost functions?

---

_[View the full topic](https://discourse.julialang.org/t/a-new-solver-for-robustified-non-linear-least-squares-problems-with-non-euclidean-variables/96085)._