UMAP parameters a/b

[jgugglberger]

Hi,
I am trying to use this repo for finding label mistakes. At the first try I got nan loss values. I saw you mentioned numerical instabilities with UMAP a/b parameters in the README. I tried a few positive values but got no luck with convergence. Do you have any tips how I should set the parameters?

Best Regards,
Josef

PS: Keep up the good work, I really like this kind of research and also Fiftyone as a product!