Re: [sage-support] f.g. subrings of polynomial rings and their Hilbert-Poincare series

2023-07-06 Thread pedritomele...@gmail.com
Dear Dina, In the case f_1,..,f_k is a SAGBI basis, you could probably use Lemma 6.2 in https://www.sciencedirect.com/science/article/pii/S0747717116300815?via%3Dihub It is not very well explained (and I just found a couple of typos; apologies), but I think that you could reproduce the idea. Hop

Re: [sage-support] Compute equalizer of maps between polynomial rings?

2022-08-26 Thread pedritomele...@gmail.com
Yes, probably working up to some degree. I do no know if this could help. El El jue, 25 ago 2022 a las 18:09, John H Palmieri escribió: > One issue is that f-id is not a ring homomorphism. So do I restrict to a > range of degrees, convert to vector spaces, and compute the kernel? I'm not > sure

Re: [sage-support] Compute equalizer of maps between polynomial rings?

2022-08-25 Thread pedritomele...@gmail.com
Dear John, Wouldn’t be of some help to consider the kernel of f-Id (with Id the identity map)? Best, Pedro El El jue, 25 ago 2022 a las 8:22, Dima Pasechnik escribió: > > > On Thu, 25 Aug 2022, 00:38 John H Palmieri, > wrote: > >> I have a polynomial ring R = k[x1, x2, ..., xn] and a ring homo

Re: [sage-support] Linear complexity profile of a binary sequence

2020-11-12 Thread pedritomele...@gmail.com
See https://ask.sagemath.org/question/9792/berlekamp-massey/ On Thu, Nov 12, 2020 at 8:55 AM Santanu Sarkar wrote: > > Dear all, > I have a binary sequence > {0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,0,1,0,1,1,1,0,0,0,1,1,0,1,0,1}. > I want to find its Linear complexity profile using SageMath. Any idea? >

Re: [sage-support] How do you use SageMath in research, education, ...?

2020-05-23 Thread pedritomele...@gmail.com
Matthias, In teaching, https://cursos-0-fc-ugr.github.io/Matematicas/derivadas-app-estudio-func-thebelab.html https://github.com/pedritomelenas/Algebra-conmutativa-y-computacional https://github.com/pedritomelenas/Algebra-II/blob/master/Grafos/Grafos%20con%20sage.ipynb All in Spanish, sorry...

Re: [sage-support] Book with Sage (and Python 3)

2019-12-24 Thread pedritomele...@gmail.com
Manfred, Thank you so much for such a nice Christmas gift. Thank you for sharing. Pedro El El mar, 24 dic 2019 a las 11:37, Manfred Einsiedler < manfred.einsied...@gmail.com> escribió: > Hi, > I am working with Menny Aka and Tom Ward on a little book for high school > and undergraduate students t