[sage-devel] Re: Multigraded Hilbert series

2009-07-05 Thread Bjarke Hammersholt Roune
I heard back from Gert-Martin Greuel of the Singular team. He said he would look into the Hilbert-related issues. He also pointing out the limitations mentioned at http://www.singular.uni-kl.de/Manual/latest/sing_343.htm#SEC384 In particular, I noticed these entries: * the (weighted) degree of

[sage-devel] Re: Multigraded Hilbert series

2009-06-29 Thread Bjarke Hammersholt Roune
I did sage: upgrade() to get Singular 3-1-0, and it does precisely the same for these inputs as 3-0-4 did. Cheers Bjarke On Jun 29, 5:21 pm, William Stein wrote: > On Mon, Jun 29, 2009 at 5:10 PM, Bjarke Hammersholt > > > > Roune wrote: > > > I should mention that CoCoALib has excellent support

[sage-devel] Re: Multigraded Hilbert series

2009-06-29 Thread William Stein
On Mon, Jun 29, 2009 at 5:10 PM, Bjarke Hammersholt Roune wrote: > > I should mention that CoCoALib has excellent support for computing > Hilbert series of monomial ideals, possibly at this time better than > that in Frobby. Indeed, CoCoALib is known for having the best > implementation of Bigatti

[sage-devel] Re: Multigraded Hilbert series

2009-06-29 Thread Bjarke Hammersholt Roune
I should mention that CoCoALib has excellent support for computing Hilbert series of monomial ideals, possibly at this time better than that in Frobby. Indeed, CoCoALib is known for having the best implementation of Bigatti Et.Al.'s algorithm anywhere (not so strange since Anna Bigatti wrote the C

[sage-devel] Re: Multigraded Hilbert series

2009-06-27 Thread William Stein
On Sun, Jun 28, 2009 at 1:09 AM, Bjarke Hammersholt Roune wrote: > > As far as I can determine, Sage does Hilbert-series only for the > grading given by the vector (1,...,1). I need Hilbert series with > respect to any vector. The optional Frobby spkg I just wrote allows to > compute this, and I'm