Ask Your Question

rafarob's profile - activity

2022-02-22 14:13:18 +0100 received badge  Famous Question (source)
2022-02-22 14:13:18 +0100 received badge  Notable Question (source)
2016-11-25 16:25:44 +0100 received badge  Popular Question (source)
2016-08-18 00:36:40 +0100 received badge  Popular Question (source)
2015-03-11 17:39:28 +0100 commented answer improper integral error?

But the correct answer is a numerical value or exact expression pi^2/4. So, algorithm = 'mathematica_free' doesn't work.

2015-03-11 14:33:19 +0100 asked a question improper integral error?

Is there an alternative way to calculate this improper integral?

integral(log(x)/(x^2 - 1),x,0,infinity)

the integral is convergent to pi^2/4 but Sage says divergent.

2015-03-03 12:27:21 +0100 received badge  Scholar (source)
2015-02-24 22:13:52 +0100 commented answer RuntimeError: should never launch viewer in embedded mode

OK. Thanks.

2015-02-24 21:08:29 +0100 received badge  Student (source)
2015-02-24 20:49:44 +0100 asked a question RuntimeError: should never launch viewer in embedded mode

In Sage version 6.3, next exemple is OK:

L = [plot(k*x,(x,-1,1)) for k in [1..3]];G = graphics_array(L);G.show(figsize=[5,3])

But in Sage version 6.4 and 6.5, we have error message

RuntimeError: should never launch viewer in embedded mode

Is there something wrong? Thanks

2014-12-06 11:34:32 +0100 received badge  Teacher (source)
2014-12-06 11:34:32 +0100 received badge  Self-Learner (source)
2014-12-04 19:02:56 +0100 answered a question sage-6.4.1 modification notebook order in shell mode

Thank you so much. I found another possible order which also works

$ sage -n default directory="/home/username/mysagenotebook.sagenb"

2014-12-03 11:13:39 +0100 asked a question sage-6.4.1 modification notebook order in shell mode

With sage-6.3 I can execute in linux from terminal mode: sage -notebook "/home/user_name/directory_that_contains_the_Sage_notebook_files.sagenb" but with sage-6.4.1 I can't I need to create a shortcut in linux desktop to execute that order.

2014-07-12 14:20:14 +0100 commented answer bug pdflatex sage-6.2 ?

Thank you very much for your help. Now everything works fine.

2014-07-10 02:14:24 +0100 commented answer bug pdflatex sage-6.2 ?

Thank you very much. But we can't modify Sage ova version for windows under VirtualBox. We can't install pdflatex in ova version for windows. Am I not right?

2014-07-08 18:50:20 +0100 asked a question bug pdflatex sage-6.2 ?

Hi guys.

In sage 6.1.1 and earlier you can evaluate without problems

sage: %latex sage: This is {\LaTeX}

but in sage 6.2 (with VM or native linux) we get the error: Error: PDFLaTeX does not seem to be installed. Download it from ctan.org and try again. None

This is a bug? Is sage-6.2 an incomplete installation?

2014-07-08 18:31:28 +0100 commented question Error: PDFLaTeX

I noticed the same error. In sage 6.1.1 and earlier under windows you can evaluate without any problems sage: % latex sage: This is {\ LaTeX} but not in sage 6.2 With Sage notebook installed in a VM from sage.-6-2.ova we can't install anything. Does the sage-6.2.ova is incomplete? Any tips? Thank you