As suggested by Urs Beyerle:
>I would suggest to reply to my mail on the mailing list and ask the SL users where they find the scientific applications
>for SL. There a plenty of repositories out there that are compatible with SL and include "scientific" rpms.

We already have one answer to where SL users find scientific packages.

>We have had good results using EPEL
>(https://fedoraproject.org/wiki/EPEL) repository alongside the SL repo.

Any others?