Maybe, I did get something wrong. But what's the problem about Gram-Schmidt 
on SR? There are just sums and divisions (and probably roots to normalize) 
in Gram-Schmidt which should not lead to problems in SR.

By the way, what does "exact" actually mean?

Am Mittwoch, 23. Oktober 2019 22:41:53 UTC+2 schrieb Emmanuel Charpentier:
>
> Well... the error message is pretty explicit: since
> sage: SR.is_exact()
> False
> M.gram_schmidt() wont work if M.base_ring is SR.
> Creating a second special case for SR may not be as simple as for RDF, 
> since a lot of other cases (beyond RDF) can happen in this case....
>

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