support for cartesian product maniforlds #60
Description
Is your feature request related to a problem? Please describe.
The original Riemannian flow matching repo had nice support for product spaces (e.g. sphere x sphere, sphere x tori x euclidean) https://github.com/facebookresearch/riemannian-fm
As far as I can see this is not supported yet in this repo, but would be very nice to have.
Describe the solution you'd like
A set of top-level manifold types that can be initialized from a set of individual manifolds to represent the cartesian product
Describe alternatives you've considered
One option would be to go back to the old repo riemannian-fm which uses geoopt as its manifold library.
I would be open to try to contribute such extensions