[sage-devel] Re: Ideals in LaurentPolynomialRing

2023-05-31 Thread enriqu...@gmail.com
I tried to compute associated_primes and it works, maybe it is related to the bug. El miércoles, 31 de mayo de 2023 a las 22:20:43 UTC+2, enriqu...@gmail.com escribió: > I guess it can be possible to get a smaller example and it may be possible > that this code has other problems. My goal is t

[sage-devel] Re: Ideals in LaurentPolynomialRing

2023-05-31 Thread enriqu...@gmail.com
I guess it can be possible to get a smaller example and it may be possible that this code has other problems. My goal is to compute the Fitting ideals of the "abelian" Alexander matrix of a finitely presented group. If you execute and hold the two last paragraphs, for me the execution time of th

[sage-devel] Re: Ideals in LaurentPolynomialRing

2023-05-31 Thread Kiran Kedlaya
I wrote that code into the Sage library and it is supposed to be doing exactly what you proposed (clear denominators and do the computation in the polynomial ring). It is possible the regression was triggered by an update to Singular; it would indeed be helpful to identify a minimal example of

[sage-devel] Re: Ideals in LaurentPolynomialRing

2023-05-29 Thread 'Travis Scrimshaw' via sage-devel
Dear Enrique, I am having a bit of trouble understanding exactly what computations are slow and fast from your description. As Nils said, can you give us some explicit code (with some comments about which parts are slow)? Best, Travis On Tuesday, May 30, 2023 at 3:28:39 AM UTC+9 Nils Bruin w

[sage-devel] Re: Ideals in LaurentPolynomialRing

2023-05-29 Thread Nils Bruin
Dear Enrique, >From what you write I get the impression you may be talking about a regression in performance relative to earlier versions of sage. If you want to make an actionable item out of this, you'll probably have to file a ticket with explicit code on it that can be profiled; preferably