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2019-03-02 23:04:25 -0600 asked a question Defining a relationship between symbolic variables

How can I define a+b+c=1 in Sage after doing var('a','b','c')? How would I make sage remember this equation so that it substitutes that value when calculating (a+b+c)².expand() for example?

2019-03-01 00:43:34 -0600 commented answer Generate a random non-singular matrix?

What about constructing a matrix of determinant K?

2019-02-28 23:44:45 -0600 asked a question Generate a random non-singular matrix?

I do this in a loop now:

while:  
    A = random_matrix(...)  
    if(not A.is_singular()):  
        ....

But this is innefficient. How do I generate random matrices with more concrete properties in sage?

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2019-01-10 02:03:16 -0600 answered a question A way to infer multiplication?

This can be set with implicit_multiplication() function

2019-01-09 20:21:01 -0600 asked a question A way to infer multiplication?

This might be asking for too much, but is there a way to interpret 5x as 5*x when 5x is not defined as an object? It gets really cumbersome writing *'s all the time. Is there a way to do this currently or is in the plans?

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2019-01-02 12:02:42 -0600 commented answer Kernel not found?

While A.right_kernel() returns [ 1 26 -16], it's only one possible solution from the solution set. Instead, I expect it to return c * [ 1 26 -16 ]. Any idea how to not miss out all the solutions?

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2019-01-02 04:24:02 -0600 asked a question Kernel not found?

Hi. Why is no kernel found for the 2x3 matrix A=[2,3,5];[-4,2,3] ?

sage: A = matrix([[2,3,5],[-4,2,3]])  
sage: A   
[ 2  3  5]  
[-4  2  3]  
sage: A.kernel()  
Free module of degree 2 and rank 0 over Integer Ring  
Echelon basis matrix:  
[]

However we know that the kernel should be given by: x=-z/16 and y=-13z/8

2019-01-01 03:29:15 -0600 asked a question Sage Python Executable On Linux

Hi. I installed Sage from https://www.archlinux.org/packages/co... I want to use the same Python sage uses to get code completion in my editor. Where can I locate this Python?

2018-11-23 19:23:38 -0600 commented answer Installing Sagemath 8.4 on WSL Ubuntu 18.04

Also, in terms of performance would you recommend running sage in docker or in wsl or on windows with Erik's setup?

2018-11-23 19:10:13 -0600 commented answer Installing Sagemath 8.4 on WSL Ubuntu 18.04

Downloading sage-8.4-Ubuntu_18.04-x86_64.tar.bz2 and running sage directly through wsl gives a warning on every startup: /mnt/c/SageMath/local/lib/python2.7/site-packages/psutil/_pslinux.py:469: RuntimeWarning: 'sin' and 'sout' swap memory stats couldn't be determined and were set to 0 ([Errno 2] No such file or directory: '/proc/vmstat') warnings.warn(msg, RuntimeWarning) I remember on my previous machine I somehow used sage with wsl without seeing this error.

2018-11-23 16:54:27 -0600 commented question Installing Sagemath 8.4 on WSL Ubuntu 18.04

I think that might indeed be the root cause for this, but 18.04 is LTS and upgrading to 18.10 seems to be very unnecessary to install Sage8.4. Who maintains the linux packages?

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2018-11-23 15:16:07 -0600 asked a question Installing Sagemath 8.4 on WSL Ubuntu 18.04

I've been having troubles doing this. I tried to download sources install the necessary deps and compile it from source, but make errored and I'd prefer installing sagemath otherwise too. sudo apt-get install sagemath seems like a good way to install it, however the latest version I get by doing sudo apt-get install sagemath on WSL 18.04 is sagemath 8.1-7ubuntu1. I also tried to do sudo apt-get install sagemath=8.4, but I received the following error:

E: Version '8.4' for 'sagemath' was not found.

How do I install the latest sagemath on Ubuntu 18.04 with apt-get install command?

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2018-10-06 19:44:59 -0600 asked a question Python3 MigrationStatus

Hello. I looked at Trac , but I couldn't make out just how far we are into migrating to python3. Looks to me that most issues are closed by now. I'd appreciate quick summary from a sage developer.