Version: 'Sage Version 5.2, Release Date: 2012-07-25' OS: Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64
On Wednesday, December 18, 2013 10:58:31 PM UTC-8, Matthias Goerner wrote: > > Ideal(PolynomialRing(RationalField(),['x','y']),-1).primary_decomposition() > returns [] as expected but > Ideal(PolynomialRing(RationalField(),['x','y']),1).primary_decomposition() > returns [Ideal (1) of Multivariate Polynomial Ring in x, y over Rational > Field]. > > Clearly the ideals are identical, so they should have the same primary > decomposition (independent of the unit it is generated by). Either, both > should return [] or [Ideal(1)]. > One would also expect the output of primary decomposition to not include > (1) similarly to the prime factorization of a natural number not including > 1, e.g., list(factor(1)) returns []. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
