20190418 15:55:32 0500  received badge  ● Nice Answer (source) 
20190411 15:44:25 0500  commented answer  Quicker expansion of multivariate polynomials OK you decide. But you can also post a simplified version of the code that shows the issue. 
20190411 13:42:53 0500  answered a question  Quicker expansion of multivariate polynomials You should provide the code of the What is the degree of the polynomials ? My understanding is that your polynomials are symbolic expressions, not genuine polynomials, which would explain part of the slowness. But it is hard to advise something interesting without more details. Also, in very high degree, one could imagine to answer your questions from the list of factors without having to build a polynomial by multipliying the factors. Having the factors is a rich information, that might be sad to lose by expanding the product. 
20190410 03:31:26 0500  answered a question  How to access serial number corresponding to each element in $GF(2^3)$? What you can do is a dictionary: 
20190409 15:49:25 0500  answered a question  Direct substitution vs "subs" method There basically no difference. Indeed, if you look at the source code of the you can see that there is : So, if you look at the besides some deprecation warnings, there is: 
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20190330 08:52:28 0500  answered a question  Please help me build a mathematical models (Linear programming problem) You can have a look at this tutorial https://doc.sagemath.org/html/en/them... Please do not hesitate to tell us in case of difficulty, by showing your code and where you are locked. 
20190222 04:12:57 0500  received badge  ● Nice Answer (source) 
20190219 14:00:55 0500  answered a question  Latex Transition Problem Your construction does not really makes sense : (f+pt1).show(xmin= xmin, xmax= xmax, ymin=20, ymax=20) does not return anything, since the So, what do you want to achieve ? EDIT Only the following 4 lines are useful: Everything else is about discrete graphs (those with vertices and edges), not with functionnal graphs, nor graphics. It turns out that and copypaste the long text you get into your latex file. To let the code work, you have to add the 
20190219 12:42:44 0500  commented question  Trouble Plotting a Function You say : "Yes I reran the code, and it worked fine." So what ? 
20190219 11:39:11 0500  commented question  Trouble Plotting a Function It works well for me, both on the command line and the jupyter notebook. What is your OS, how did you install Sage, which commands did you type before that (in particular, did you redefine 
20190218 18:31:11 0500  answered a question  A function being an input The parameter 
20190218 09:15:30 0500  answered a question  solve(x) does not fully isolate x. Can Sympy use assume()tions? Unfortunately, the Sage's assumptions are not passed to sympy and conversely, see trac ticket 24334 and trac ticket 24078. What you can do as a workaround is to directly pass 
20190214 12:12:20 0500  answered a question  how to substitute several variables on both sides of the equation? You will have to struggle with wildcards, see examples on the page: https://doc.sagemath.org/html/en/refe... If the substitution involves both righthand side and lefthand side of the equation or 
20190214 02:50:28 0500  answered a question  "=" vs "=="  when to use what? Actually, in Python I would say that 
20190214 02:43:44 0500  answered a question  Can't post karma insufficient to publish links Actually, there is a link in your post at the line: This is an antispam feature, now, with 11 points of karma, you should be able to post links. 
20190212 09:12:12 0500  answered a question  propagation of error calculation? The usual way for certified numerics is to use inverval arihmetics and ball arithmetics. You can have a look at this thematic tutorial about the various representations of real and complex numbers in Sage, which include the https://mathexp2018.metelu.net/worksh... In case the page disapears, you can finf a very close version on trac ticket 15944 (disclaimer : i am the author of the worksheet). You can also have a look at the book Computational Mathematics with SageMath : http://sagebook.gforge.inria.fr/engli... 
20190211 14:07:24 0500  received badge  ● Nice Answer (source) 
20190209 15:48:15 0500  answered a question  Algebra of functions f:Z_3 > R At first, you can have a look to the following thematic tutorials about implementing your own algebraic structure in Sage: 
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20190209 04:13:27 0500  commented question  No output when documentation say it should be OK I, do not have winows with me, let me just add the windows tag so that inerested people can focus on that. 
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20190208 17:27:30 0500  commented question  No output when documentation say it should be It works for me (Sage 8.7.beta3, complied on Debian jessie 64bit, run from the command line). Could you please give us some informations so that someone can try to reproduce your problem:

20190208 14:05:56 0500  received badge  ● Nice Answer (source) 
20190208 11:01:40 0500  answered a question  JupyterPython3 notebooks. Python 3 is compiled with Sage. To have it available as a jupyter kernel, just open a terminal and type: EDIT Note that trac ticket 26441 asks for having both kernels available in Sage. The problem is that currently the 
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20190204 10:26:15 0500  commented question  What does the [ File " " , Line 1, in < module > ] error mean? I can not reproduce your problem, perhaps did you type a special character instead of a space somewhere. Try to retype everything, and do not put any space before your command. 
20190204 09:49:23 0500  commented answer  firefox tab completion sagemath From the terminal, run the command : You will get some wbpage that proposes you to migrate your sagenb worksheets into jupyter worksheets. Open them and save them into some directory. Then, you can start the jupyter notebook directly by typing: 
20190203 08:56:13 0500  answered a question  How plot revolution of a circle to generate a sphere by animation view? For each step of the (discretized) revolution process you have to define a picture, and you will glue the pictures into an animation with the

20190203 08:33:20 0500  answered a question  How to plot a diagram of a circle obtained by section of a sphere by a plane This looks like homework. Please look at:

20190203 04:38:38 0500  answered a question  firefox tab completion sagemath I am not sure about your actual problem since i am not running ubuntu 18.10, so that i can not reproduce your problem. That said, i would strongly recommend to switch to the jupyter notebook, not only because it will fix your problem, but also since the Sage notebook is deprecated for a while and gets updated only to fix critical issues. On the jupyter notebook, to remove a cell, just go into the command mode by typing on the 
20190203 03:06:08 0500  answered a question  jsmol problem in Sagemath/Jupyter notebooks The easiest way in your settings is definitely to compile Sage by yourself, so that jsmol will be installed as a standard package. On Debianlike systems, it is pretty straightforward, see the doc at : https://doc.sagemath.org/html/en/inst... The source code of Sage can be downloaded at https://www.sagemath.org/downloadsou... 
20190201 14:08:18 0500  answered a question  how to change rhs() of an equation in an equation list Why not just rewriting the equation: 
20190201 07:31:37 0500  answered a question  Checking that all values in an array satisfy an inequality You can use 
20190131 05:32:00 0500  commented question  how to get hints on fixing silly syntax errors It works for me. Didi you check that the space is not a wrong invisible character ? 
20190131 03:51:43 0500  answered a question  x coordinate Of an Elliptic Curve point Maybe: 
20190130 03:52:34 0500  commented answer  How to create a coercion on hyperbolic models? This is the first thing i teach during Sage trainings ! 
20190129 14:12:15 0500  received badge  ● Nice Answer (source) 