[sage-devel] partial fraction decomposition function for multivariate rational expressions

2011-11-14 Thread Alex Raichev
Hi all: I'd like to extend Sage's partial fraction decomposition function in the QuotientField class to a function that works on quotients of *multivariate* polynomials. To this end, i've found it convenient to store a rational expression $F = P/(Q_1^{e_1} \cdots Q_m^{e_m})$ as a Python list of th

[sage-devel] Re: function to check for algebraic dependence given a list of polynomials

2011-01-12 Thread Alex Raichev
Cool beans, Martin. I'll take your advice and pop the method into mq.MPolynomialSystem after you move the class into sage.rings.polynomial. Thanks. Alex On Jan 13, 12:21 pm, Martin Albrecht wrote: > On Wednesday 12 January 2011, AlexRaichevwrote: > > > I had some library problems in creating a

[sage-devel] Re: function to check for algebraic dependence given a list of polynomials

2011-01-12 Thread Alex Raichev
I had some library problems in creating a Sage sandbox but resolved them with the help of ask.sagemath.org. So now i'm back into submitting to Sage a function that checks whether a list of polynomials is algebraically independent. Since my function uses an elimination ideal, i took Simon's advice

[sage-devel] Re: function to check for algebraic dependence given a list of polynomials

2011-01-06 Thread Alex Raichev
simple alg_dep method. Alex On Jan 6, 9:09 pm, Simon King wrote: > Hi Alex! > > On 6 Jan., 04:15, Alex Raichev wrote: > > > As a newbie Sage contributor, i thought it would be good practice to > > submit small chunks of code (instead of big ones like what i recently >

[sage-devel] function to check for algebraic dependence given a list of polynomials

2011-01-05 Thread Alex Raichev
Hi all: As a newbie Sage contributor, i thought it would be good practice to submit small chunks of code (instead of big ones like what i recently submitted). So i wrote a useful little function to check algebraic dependence for a given list of polynomials (documentation below). I'd like to get

[sage-devel] Re: new code for computing asymptotics of multivariate generating functions

2011-01-04 Thread Alex Raichev
Righto. Thanks, Volker. Alex On Jan 5, 11:21 am, Volker Braun wrote: > Hi Alex, > > You should reply on the trac ticket, not on sage-devel. That'll keep the > discussion more focussed. > > For general code layout questions I would suggest to look at how similar > things are implemented in Sage.

[sage-devel] Re: new code for computing asymptotics of multivariate generating functions

2011-01-04 Thread Alex Raichev
king that can't happen easily with a *.sage file." Can you or someone else explain that? Are *.sage and *.py files different? Should i be making *.py files instead? Thanks for your attention. Alex On Dec 23 2010, 11:38 am, Alex Raichev wrote: > Thanks for the advice, Rob.  Here&

[sage-devel] Re: new code for computing asymptotics of multivariate generating functions

2010-12-22 Thread Alex Raichev
oosing the right component (say combinatorics?) will > also make it visible to the right people. > > Be sure to post the code as a patch against a relatively recent > version of Sage or else it'll be difficult for anybody to go over it. > You'll have seen how to do that in the

[sage-devel] new code for computing asymptotics of multivariate generating functions

2010-12-21 Thread Alex Raichev
Hi all: I just finished documenting and testing some new Sage code related to analytic combinatorics. More specifically, the code is a collection of functions designed to compute asymptotics of Maclaurin coefficients of (special classes of) multivariate generating functions. I'd like to share t