Ronny Bergmann

> * `action_matrix(::SpecialOrthogonal(n), p)` then you get a [familiar rotation matrix](https://en.wikipedia.org/wiki/Rotation_matrix), [also Lie groups](https://en.wikipedia.org/wiki/Lie_group), assuming `LeftAction` Just a remark on this. Currently also `SpecialOrthogonal` (see https://juliamanifolds.github.io/Manifolds.jl/stable/manifolds/group.html#Manifolds.SpecialOrthogonal) is a manifold whose...

Thanks for all the time you invest. Yes I think a `convert(::SpecialOrthogonal{3}, q:UnitQuartenion)` would convert the unit quaternion to the default representation (i.e. rotation matrices) on SO(3); that would surely...

This could indeed just be added to ManifoldsBase?

Very good issue to keep track of; I haven't had the tie to read into reciepes yet, but I would be very interested 1. Plot phase valued data (`Circle()`) using...

Ref to #248 for two 2D recipes (Hyperbolic) and #245 which I think I know how to finish.

@sethaxen how would you do a visualization for rotations? I could check that after I finished those two above, now that I finally understood Plotting Recipes (`RecipesBase.jl` to be precise).

Sure we should have all of those :) For SO(3) there is also a huge zoo of possibilities, when you further consider their quotient spaces. A colleague of mine is...

Sure, in general this can be implemented. But for now these are not yet implemented, since we are only here main developers (compared to for example geomstats whose paper lists...

> Ok, I understand , I will surely try and get back to you when having problems, so just to start which Manifold class should I inherit AbstractManifold, or some...

This looks nice, but I thought it should become only a special case, where we use this approach in solve_exp_ode and not the new default (since we introduce the generic...