[Haskell-cafe] vector-space and standard API for vectors

[Alexey Khudyakov]

> We already know that there are noncommutative modules/vectorspaces of
> interest (e.g., modules over quaternions and modules over graph paths),
> why not support them from the beginning? It seems like you're going out
> of your way to exclude things that would be trivial to include. This is
> exactly why this is my standard complaint against the various proposals
> out there for new numeric hierarchies. People who are used to only using
> R^n think the proposals are just fine, but none of the proposals capture
> the structures I work with daily. Which means the new proposals are no
> better than the Prelude for me.
>
Could you tell what data structures do you use? It's difficult to think 
about them without concrete examples.