[sage-support] sage days 127, TU Vienna, Austria

Dear all, this is the final announcement of sage days 127 - https://wiki.sagemath.org/days127 from Saturday 22 February to Tuesday 25 February 2025 at TU Wien, Austria. In this workshop, we will provide tutorials for beginners as needed and discover ways how to profit from SageMath's capabilit

[sage-support] Re: Multivariate Non-Commuting power series

In principle, the lazy series framework should be able to do what you want. sage: F = FreeAlgebra(QQ, ["x","y"], degrees=(1,1)) sage: A = LazyCompletionGradedAlgebra(F) sage: F. = FreeAlgebra(QQ, degrees=(1,1)) sage: A = LazyCompletionGradedAlgebra(F) sage: x = A(x); y = A(y) sage: f = 1/(1-x-y^2)

[sage-support] Re: Somethog in rotten is the state of Maxima...

@Emmanuel, why are you saying that FriCAS returns the same as sage? For me, fricas.solve works as expected. Martin On Sunday, 9 October 2022 at 18:43:03 UTC+2 Emmanuel Charpentier wrote: > It turns out that the original author has also posted this problem in > sage-devel

Re: [sage-support] subs in fractions of polynomials

ah! that's a good idea. is it "obvious", that subs won't work? dim...@gmail.com schrieb am Sonntag, 14. November 2021 um 12:27:44 UTC+1: > how about ex(c=1) ? > > On Sun, Nov 14, 2021 at 11:25 AM 'Martin R' via sage-support > wrote: > > >

[sage-support] subs in fractions of polynomials

I would expect subs to replace c with 1, but it doesn't. Why? sage: S. = QQ[] sage: R. = S[] sage: ex = (a*x+b)/(c*x + d) - (e*x+f)/(g*c*x + g*d) sage: ex ((a*g - e)*x + b*g - f)/(c*g*x + d*g) sage: ex.subs(c=1) ((a*g - e)*x + b*g - f)/(c*g*x + d*g) sage: ex.subs({c:1}) ((a*g - e)*x + b*g - f)/(c

[sage-support] Re: (LaTeX/dot2tex) view posets with edge and vertex labels

Sorry for answering my own question. It seems that sage: P = Poset([[1,2,3,4], [[1,2], [2,3], [1,4]]]) sage: e = {i: LatexExpr("q^%s" % i) for i in P} sage: c = {(i,j): LatexExpr("%s^%s" % (i, j)) for i, j in P.cover_relations()} sage: H = P.hasse_diagram() sage: [H.set_edge_label(v1, v2, c[(v

[sage-support] (LaTeX/dot2tex) view posets with edge and vertex labels

is it possible to display a poset with (LaTeX) labels on the covering relations and (LaTeX) labels on the vertices? For example: sage: P = Poset([[1,2,3,4], [[1,2], [2,3], [1,4]]]) sage: e = {i: "$q^%s$" % i for i in P} sage: c = {(i,j): "$%s^%s$" % (i, j) for i, j in P.cover_relations()} sage:

[sage-support] Re: Trouble with launching external viewer

I just discovered that this only happens when I use xdg-open from within emacs, no matter whether I use ansi-term or something else. Martin R schrieb am Sonntag, 6. September 2020 um 12:18:56 UTC+2: > > On a completely clean install (ubuntu, sage 9.2.beta11), doing > > sage: plot(sin(x), (x,0,3))

[sage-support] Trouble with launching external viewer

On a completely clean install (ubuntu, sage 9.2.beta11), doing sage: plot(sin(x), (x,0,3)) Launched png viewer for Graphics object consisting of 1 graphics primitive or sage: view(graphs.PetersenGraph()) does not actually launch the external viewer. doing xdg-open in the sage -sh does. viewe

[sage-support] How to make view open pdf-viewer in background

Hi there! I'm using view to display my graphs and posets. I would like to have it run the viewer (xdg-open, which in the case at hand is evince) in the background. This is on a linux box, running sage 6.5.beta2. Many many thanks! Martin -- You received this message because you are subscrib

[sage-support] tab-completion in sage_mode / emacs broken

Hi there, I just installed sage 6.3.beta1 (via git) and sage_mode. Unfortunately, tab completion is broken in emacs. I'm using GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.10). When I press tab, the mouse pointer changes into the "please wait" thingy, and nothing happens. top doesn