catching `online=True` in `gromov_wasserstein`

[zoepiran]

catching `online=True` in `gromov_wasserstein`

[marcocuturi]

So I guess there are two options:

• do nothing, but at least it does fail (so it's not a silent error)
• pass a warning message? I feel that if we do this we might have to do it for other parameter selections that may not be always necessarily valid.

[zoepiran]

First of all, maybe an intermediate resolution is to add some docs, because from the manner it fails the user cant really understand this is the source. In addition, in an extreme situation it may be that the shapes are such that it won't fail.
And, maybe worth thinking which parameters we should check for to ensure valid GW ?

[marcocuturi]

another option could be to drop it explicitly (i.e. pop it from kwargs and replace by False)?

[zoepiran]

yes. probably easiest.

[zoepiran]

together with @michalk8 found the source of the original failure (misusage of jnp.where). @michalk8 wants to allow online for GW and will fix accordingly