Hi Robert, thanks again, and sorry, my question was not well posed, fortunately (as a mathematician) I know what an isomorphism is :-), when I asked what does this exactly mean I actually wanted to know if in the cases 'sqrt(5. + RDF(5))' and 'sqrt(RDF(5) + 5.)' computation is performed by two different implementations of sqrt (gsl and mpfr) ?
which would mean that sage could be non-commutative in some pathological cases (or simply if one of the implementations is buggy), this would be an inconsistency which is not comparable with non- associativity etc., because the latter obviously can't be avoided since fixed precision reals do not form a field ... thanks, Georg --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
