ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Sun, 17 Nov 2019 06:41:42 -0600SageMath cannot access Mathematicahttp://ask.sagemath.org/question/48785/sagemath-cannot-access-mathematica/I have installed Mathematica Version 11.3 at a Linux system (openSUSE Leap 15.1) on a partition "math", i.e. separated from the Linux home and system partition. I have tried to send Mathematica expressions from SageMath to Mathematica in the manner described in the SageMath reference by using a SageMath Notebook or its command line interface. They are rejected with:
> TypeError: unable to start mathematica: End Of File (EOF). Exception style platform.
Mathematica finished running /usr/bin/sh -c stty -echo; math -rawterm
command: /usr/bin/sh
args: ['/usr/bin/sh', '-c', 'stty -echo; math -rawterm']
buffer (last 100 chars): ''
before (last 100 chars): 'es/Linux/WolframKernel\r\nnot found. Your Mathematica installation may be i incomplete\r\nor corrupted.\r\n'
after: <class 'pexpect.exceptions.EOF'>
In the course of the installation of Mathematica I added the path to the math command line interface of Mathematica to the common PATH-sequence. Therefore I am able to access the Mathematica command line interface by simply entering math or the command:
> /usr/bin/sh -c stty -echo; math -rawterm
using a bash-terminal outside SageMath. I have checked that I can do it without the need for specifying the complete path to math. However, entering the same command within a Sage-session by using the Python's OS- interface is only successful if the full path to math is specified:
> /usr/bin/sh -c stty -echo; /run/media/bernhardi/math/math -rawterm
The error appearing otherwise is the same as that one returned by the above described trials to send mathematica objects. The protocol shows that the mathematica objects are sent to Mathematica without detailed path info. Thus, obviously the SageMath-Mathematica interface does not recognize the complete path info that is availabe in the basic Linux system. Maybe the missing info is caused by the fact that Mathematica is located on a remote partition. Therefore my question: Is it possible to provide sageMath with the needed full path to math?
Unfortunately it is not possible to attach the complete output of SageMath.bekalphSun, 17 Nov 2019 06:41:42 -0600http://ask.sagemath.org/question/48785/Does sagemath move asterisks down?http://ask.sagemath.org/question/48601/does-sagemath-move-asterisks-down/I am using sagemath.sty. The multiplication asterisks that are shown in the *sagecommandline* environment are far too low. How can I adjust them?
I am bringing in a TrueType font using fontspec. This is a coding font so the asterisks are lower than in many other fonts. That I can tell, sagemath is moving them vertically and the result is that they fall into the baseline.
Here is my file *try.tex*. Below I have links to two images showing the output for the two fonts listed. (The coding font ProggyClean.ttf is from a web site called proggyfonts.net but I included the images so you needn't download it to see what I mean.)
% -*- coding: utf-8 -*-
\documentclass{article}
\usepackage{xcolor}
\definecolor{pythoncolor}{HTML}{BCD4CE}
\usepackage[T1]{fontenc}
\usepackage{fontspec}
\newfontface\listingsfont[Path=../fonts/,
Scale=1.05,Color=blue]{ProggyClean.ttf}
% \newfontface\listingsfont[
% Color=red]{Charis SIL}
\usepackage{sagetex}
\RequirePackage{listings}
\lstset{basicstyle=\listingsfont,
columns=flexible,
}
% Copied and modified from sagetex
\lstdefinestyle{SageInput}{basicstyle=\listingsfont,
}
\lstdefinestyle{SageOutput}{basicstyle=\listingsfont,
}
% Test how it looks under regular verbatim style
\makeatletter
\newcommand{\verbatimfont}[1]{\def\verbatim@font{#1}}%
\makeatother
\begin{document}
% Text in the listings font
{\listingsfont abc**def "jklm" 'nopq'}
% Test under regular verbatim
\verbatimfont{\listingsfont}
\begin{verbatim}
xyz**xyz
\end{verbatim}
% Text under Sage
\begin{sagecommandline}
sage: 4**3+16
sage: 2-3/4*5
\end{sagecommandline}
\end{document}
The result of using ProggyClean is at i.imgur.com/EcbAtMN.png (I lack the karma to post links) and gives asterisks in the baseline. The result of uncommenting the text font Charis SIL is at i.imgur.com/ltFkamq.png and looks much better, I think because its asterisks started out higher.
How can I adjust the height of these myself? Thank you.
James HefferonSun, 03 Nov 2019 11:47:06 -0600http://ask.sagemath.org/question/48601/How to find the subgraph homeomorphic to $K_5$ or $K_{3,3}$?http://ask.sagemath.org/question/48055/how-to-find-the-subgraph-homeomorphic-to-k_5-or-k_33/ Given a graph $ G$ it is easy to check whether the Graph is planar or not using the command "$G$.is_planar()"
However I am stuck on the following :
Given a non-planar graph $G$ is it possible to find a subgraph of $G$ which is homeomorphic to $K_5$ or $K_{3,3}$?
As per Kuratowski Theorem any Graph $G$ is planar if and only if $G$ has a subgraph homeomorphic to $K_5$ or $K_{3,3}$.
Is it possible to find the required subgraph using sagemath?
CaptchaWed, 25 Sep 2019 06:24:59 -0500http://ask.sagemath.org/question/48055/Access to files produced by view() in Jupyterhttp://ask.sagemath.org/question/47963/access-to-files-produced-by-view-in-jupyter/ How would one access files produced by the view() function, when running Sagemath in Jupyter[hub] notebooks? The files are ~/.sage/temp/<hostname>/<pid>/sage_viewerXYZ/sage.{tex,pdf}. External viewer can't be invoked when using notebook server (Jupyterhub) and I would like to do something like show(html("<a href='location/sage.pdf'>PDF</a>)).Šarūnas BurdulisWed, 18 Sep 2019 11:39:07 -0500http://ask.sagemath.org/question/47963/Can I convert a Sage symbolic expression into a callable Python function?http://ask.sagemath.org/question/46813/can-i-convert-a-sage-symbolic-expression-into-a-callable-python-function/Hi, and thanks ahead of time for the help!
I haven't had any luck finding an answer to this so far, and I'm still fairly new to Sage (and honestly, code-work in general).
I've been working on a (probably for most) small project of determining coefficient functions by use of a taylor expansion and solving a linear system. Basically, I have one polynomial with unknown coefficient functions f_2, f_3, f_4, ..., expand it with a taylor series and then match the expansion to another, known polynomial function. Then, I am solving this system for f_2, f_3, f_4, etc.
I've got this all figured out for the most part since, but my research adviser wants these functions (once solved) to be output as a callable python function. Basically, once the Sage script finds the functions, the goal is to have a defined python function that can either be copy/pasted into another script for use (at the least), or for them to be output into their own type of package file that can then be imported into a python script for use.
Like, as an example, "f_2=2*n_b+L**K" gets converted into a python function f_2(n_b, L, K) so the end-user doesn't have to rebuild f_2 from scratch in their python script.
I was thinking I might be able to spend a day or two grinding them out in a manual sense with print() commands, but was wondering if there is a better/good/any way to actually do this. adeacondarklyWed, 05 Jun 2019 12:46:30 -0500http://ask.sagemath.org/question/46813/using cplex as a solver in sage - import error undefined symbol: CPXsetlogfilehttp://ask.sagemath.org/question/46606/using-cplex-as-a-solver-in-sage-import-error-undefined-symbol-cpxsetlogfile/Hi,
Ubuntu 18.04; Installed cplex_studio129.linux-x86-64.bin and then Sage 8.7 from source.
I chose source to allow me to "make" Sage again after linking the necessary CPLEX files as described at the very bottom of the page here:
doc.sagemath.org/html/en/thematic_tutorials/linear_programming
i.e. from
/home/klara/sage-8.7/local/lib
`ln -s /opt/ibm/ILOG/CPLEX_Studio129/cplex/lib/x86-64_linux/static_pic/libcplex.a .`
and from:
/home/klara/sage-8.7/local/include
`ln -s /opt/ibm/ILOG/CPLEX_Studio129/cplex/include/ilcplex/cplex.h .`
and finally, also from:
/home/klara/sage-8.7/local/include
`ln -s /opt/ibm/ILOG/CPLEX_Studio129/cplex/include/ilcplex/cpxconst.h .`
But now I get the following import error when running:
sage: p = MixedIntegerLinearProgram(solver='CPLEX')
ImportError: /home/klara/sage-8.7/local/lib/python2.7/site-packages/sage/numerical/backends/cplex_backend.so: undefined symbol: CPXsetlogfile
(By the way, after installing Sage but before linking and remaking I got the more basic import error:
`ImportError: No module named cplex_backend`)
Any hints as what to look into would be appreciated.
Thanks.
----------
Here is the Full Output of the error:
sage: p = MixedIntegerLinearProgram(solver='CPLEX')
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-1-d320ed52392f> in <module>()
----> 1 p = MixedIntegerLinearProgram(solver='CPLEX')
/home/klara/sage-8.7/local/lib/python2.7/site-packages/sage/misc/lazy_import.pyx in sage.misc.lazy_import.LazyImport.__call__ (build/cythonized/sage/misc/lazy_import.c:3690)()
352 True
353 """
--> 354 return self.get_object()(*args, **kwds)
355
356 def __repr__(self):
/home/klara/sage-8.7/local/lib/python2.7/site-packages/sage/numerical/mip.pyx in sage.numerical.mip.MixedIntegerLinearProgram.__init__ (build/cythonized/sage/numerical/mip.c:3931)()
449 self._first_variable_names = list(names)
450 from sage.numerical.backends.generic_backend import get_solver
--> 451 self._backend = get_solver(solver=solver,
452 constraint_generation=constraint_generation,
453 base_ring=base_ring)
/home/klara/sage-8.7/local/lib/python2.7/site-packages/sage/numerical/backends/generic_backend.pyx in sage.numerical.backends.generic_backend.get_solver (build/cythonized/sage/numerical/backends/generic_backend.c:20060)()
1647 raise ValueError("'solver' should be set to 'GLPK', 'Coin', 'CPLEX', 'CVXOPT', 'Gurobi', 'PPL', 'InteractiveLP', or None.")
1648
-> 1649 cpdef GenericBackend get_solver(constraint_generation = False, solver = None, base_ring = None):
1650 """
1651 Return a solver according to the given preferences
/home/klara/sage-8.7/local/lib/python2.7/site-packages/sage/numerical/backends/generic_backend.pyx in sage.numerical.backends.generic_backend.get_solver (build/cythonized/sage/numerical/backends/generic_backend.c:19611)()
1794
1795 elif solver == "Cplex":
-> 1796 from sage.numerical.backends.cplex_backend import CPLEXBackend
1797 return CPLEXBackend()
1798
ImportError: /home/klara/sage-8.7/local/lib/python2.7/site-packages/sage/numerical/backends/cplex_backend.so: undefined symbol: CPXsetlogfilebucks65Tue, 21 May 2019 06:36:42 -0500http://ask.sagemath.org/question/46606/Is there any way to plot3d latex package on sagemath?http://ask.sagemath.org/question/46550/is-there-any-way-to-plot3d-latex-package-on-sagemath/I want to draw a triangle on hyperboloid and put the name of angles and vertices but for example when i want use alpha or beta it doesn't show up?
NB i use sagemath.
Here is an example of angles drawn on a surface, to illustrate what I want to achieve:
- [https://commons.wikimedia.org/wiki/File:Spherical-triangle.png](https://commons.wikimedia.org/wiki/File:Spherical-triangle.png)Taoufik ahanchaouThu, 16 May 2019 23:46:06 -0500http://ask.sagemath.org/question/46550/Anyone successfully install rdkit into sagmath?http://ask.sagemath.org/question/44617/anyone-successfully-install-rdkit-into-sagmath/ Rdkit is conda-installed and when you use the official installation instructions, the rdkit goes into the miniconda python library rather than the sagemath python.
I have been able to get them together by installing both sage and rdkit using conda, except the conda sage is 8.3, not 8.4.
JoalHeagneySun, 09 Dec 2018 02:06:30 -0600http://ask.sagemath.org/question/44617/How to realize the composition of rational function mappings with Sagemath?http://ask.sagemath.org/question/44063/how-to-realize-the-composition-of-rational-function-mappings-with-sagemath/If I have two rational function mappings :
f(x,y): (x,y )------>( x^2+15x-2 / x+15, x^2y+xy+y / x^2+30x-1 );
g(x,y): (x,y )------>( x^2+20x-18 / x+20, x^2y+xy+32y / x^2-31x+14 );
how to compute the f(g(x,y)) with sagemath?xiwang0213Wed, 24 Oct 2018 22:03:33 -0500http://ask.sagemath.org/question/44063/Sagemath does not open anymorehttp://ask.sagemath.org/question/43674/sagemath-does-not-open-anymore/ I was trying to install `sagemath-jupyter` on my Arch Linux (which turned out to be a near impossible task) and deleted a bunch of packages from pip2. Now I can't even open sagemath, even after re-installing sagemath from Pacman:
Traceback (most recent call last):
File "/usr/bin/sage-ipython", line 12, in <module>
from sage.repl.interpreter import SageTerminalApp
File "/usr/lib/python2.7/site-packages/sage/repl/interpreter.py", line 109, in <module>
from sage.repl.prompts import SagePrompts, InterfacePrompts
File "/usr/lib/python2.7/site-packages/sage/repl/prompts.py", line 16, in <module>
from IPython.terminal.prompts import Prompts
File "/usr/lib/python2.7/site-packages/IPython/__init__.py", line 48, in <module>
from .core.application import Application
File "/usr/lib/python2.7/site-packages/IPython/core/application.py", line 23, in <module>
from traitlets.config.application import Application, catch_config_error
File "/usr/lib/python2.7/site-packages/traitlets/__init__.py", line 1, in <module>
from .traitlets import *
File "/usr/lib/python2.7/site-packages/traitlets/traitlets.py", line 60, in <module>
from .utils.importstring import import_item
File "/usr/lib/python2.7/site-packages/traitlets/utils/importstring.py", line 8, in <module>
from ipython_genutils.py3compat import cast_bytes_py2
ImportError: No module named ipython_genutils.py3compat
Any ideas on how to overcome this? (And preferably also installing `sagemath-jupyter`?
I have installed `ipython_genutils` with pip2 already (version 0.1.0).tomchoFri, 14 Sep 2018 11:54:56 -0500http://ask.sagemath.org/question/43674/Running Sagemath 8.2 natively in Windows, how to change the Jupyter default directory?http://ask.sagemath.org/question/42445/running-sagemath-82-natively-in-windows-how-to-change-the-jupyter-default-directory/ With SageMath 8.2 running natively under Windows 10, the Jupyter dashboard opens by default in the directory `C:\Users\<me>`, so I then have to navigate to the desired directory that contains my Jupyter notebook .ipynb files.
***How can I cause Jupyter to open directly in the desired directory?***
The relevant Windows shortcut has the following Target Property:
`"C:\Program Files\SageMath 8.2\runtime\bin\mintty.exe" -t 'SageMath 8.2 Notebook Server' -i sagemath.ico /bin/bash --login -c '/opt/sagemath-8.2/sage --notebook jupyter'`
Can the `sage --notebook jupyter` portion be adjusted somehow to specify the desired directory?res0001Sat, 26 May 2018 21:59:30 -0500http://ask.sagemath.org/question/42445/Error occurs Compiling with sage “SystemError: new style getargs format but argument is not a tuple”http://ask.sagemath.org/question/43411/error-occurs-compiling-with-sage-systemerror-new-style-getargs-format-but-argument-is-not-a-tuple/ When the following codes are compiling with python everything is good, there is no error, but when I compile with sage it occurs the error : "SystemError: new style getargs format but argument is not a tuple"
Here is my code
from PIL import Image
file=Image.open('/home/mks/Desktop/Shamir_VSIS/si.jpeg')
file2=file.convert("L")
pix = file2.load()
colsize,rowsize=file2.size
for i in range(rowsize):
for j in range(colsize):
if pix[j,i]>250:
pix[j,i]=250
file2.save('/home/mks/Desktop/Shamir_VSIS/si.pgm')
How can I fix this issue?math.mks@yandex.comSat, 18 Aug 2018 01:35:18 -0500http://ask.sagemath.org/question/43411/How do I upgrade sagemath from 7.4 to 8.2http://ask.sagemath.org/question/43160/how-do-i-upgrade-sagemath-from-74-to-82/I'd like to upgrade sagemath directly without installing the software from scratch. May I have to add a specific repository or is there a command to execute it from consolle? thank you.LukakuThu, 26 Jul 2018 07:14:06 -0500http://ask.sagemath.org/question/43160/Is there a way to use sage-boolean-values in Latexhttp://ask.sagemath.org/question/43131/is-there-a-way-to-use-sage-boolean-values-in-latex/Hey there,
im completely new to sage and so far i got along quite well, but i can't figure this one out. I want to create randomized mathproblems and i want latex to decide what to print depending on calculations in sage.
So here is a functional minimal example:
\documentclass{article}
\usepackage{sagetex}
\begin{document}
\begin{sagesilent}
a = ZZ.random_element(1,20)
b = ZZ.random_element(1,20)
\end{sagesilent}
$\sage{a}-\sage{b}$
\end{document}
What do i need to do if i want to switch a and b depending on if the result is negative or not?bentheteacherTue, 24 Jul 2018 16:13:31 -0500http://ask.sagemath.org/question/43131/How to show the output of print() in to jupyter notebook?http://ask.sagemath.org/question/43078/how-to-show-the-output-of-print-in-to-jupyter-notebook/ In Sagemath's Jupyter Notebook, The output of print () always is showed into terminal. So for this reason, I can not get output of the functions such as graph_classes.Tree.description(). But in the anacanda's jupyter notebook for python, we can show the output of print() in jupyter notebook. How to solve the problem? Thanks.dannyThu, 19 Jul 2018 07:50:09 -0500http://ask.sagemath.org/question/43078/Missing root when solving equation in sageMathhttp://ask.sagemath.org/question/43052/missing-root-when-solving-equation-in-sagemath/When I solve equation using sageMath, it missed one root.
sage: solve([4/5*(x - 1)^2/x^(1/5) + 2*(x - 1)*x^(4/5)==0] ,x)
[x == (2/7), x == 1]
The equation has 3 roots. It misses x==0.
What is the reason?Sam TanTue, 17 Jul 2018 18:58:17 -0500http://ask.sagemath.org/question/43052/Differences between Python2 Sagemath and Python3 Sagemath?http://ask.sagemath.org/question/42932/differences-between-python2-sagemath-and-python3-sagemath/ With sagemath looking to move away from python2 in 2020 and as a new user of sagemath, I wanted to know what the differences are between Python2 Sagemath and Python3 Sagemath?
At the moment sagemath is not fully compatible with python3 and I have been told to expect problems. I want to know how serious these problems are and how frequent they are. I would then be able to know if using python3 sagemath is worth the trouble.number123Wed, 11 Jul 2018 14:35:20 -0500http://ask.sagemath.org/question/42932/PARI/GP error in wrapping custom-defined PARI functions in Sage using the command gp.set()http://ask.sagemath.org/question/42638/parigp-error-in-wrapping-custom-defined-pari-functions-in-sage-using-the-command-gpset/ I have a library in PARI/GP and since Sage also supports the GP calculator I have been trying to shift my library using gp.set() and gp.get() commands. So far all functions are working but I got a PARI/GP error while implementing this function in Sage using gp.set(). Here is the code of that function:
compareSides(printedgesonscreen=0) =
{
local( edge, edgesCheckList1:list, edgesCheckList2:list, cancelCriterion);
edgesCheckList1 = listcreate(2*numberOfLines);
edgesCheckList2 = listcreate(2*numberOfLines);
for (j = 1, numberOfSpheres,
if( deleteFlag[j] == 0,
if( printedgesonscreen == 1,
print("Cell ",j," lies on the hemisphere with center at ",
divideInNumberField(K,Lambda[j],Mu[j]) );
print(" with radius square ", radiusSquare[j],
" and has the following edges:");
);
for( s = 1, length( pointsOfLine[j]),
edge = setintersect(Set(pointsOfLine[j][s]),
Set(pointsOfSphere[j]:list));
if(length(edge) == 2,
if(printedgesonscreen == 1, print(edge); );
if( setsearch(Set(edgesCheckList1),edge),
if(setsearch(Set(edgesCheckList2),edge),
if (printedgesonscreen == 1,
print("***Error in function compareSides: triple edge in cell diagram");
);
,
listput(edgesCheckList2,edge);
);
, /* else not yet entered in edgesCheckList1 */
listput(edgesCheckList1,edge);
);
);
if(length(edge) > 2,
print("***Error in function compareSides: edge with three corners");
);
);
);
);
if(Set(edgesCheckList1) == Set(edgesCheckList2),
print("All ", length(edgesCheckList1), " = ",
length(edgesCheckList2)," edges appear twice.");
if( length(edgesCheckList1) > 3,
cancelCriterion = 1
,
cancelCriterion = 0
);
, /* else some edges do not appear twice. */
print("Some edges do not appear twice:");
print(setminus(Set(edgesCheckList1),Set(edgesCheckList2)));
);
listkill(edgesCheckList1); listkill(edgesCheckList2);
/* Return */ cancelCriterion
};
I have run this function in the GP calculator of Sage using the gp.console() command and it works fine but I don't understand why it is not working using gp.set(). Here is the implementation I did:
gp.set('compareSides(printedgesonscreen=0)','{ local( edge, edgesCheckList1:list, edgesCheckList2:list, cancelCriterion); edgesCheckList1 = listcreate(2*numberOfLines); edgesCheckList2 = listcreate(2*numberOfLines); for (j = 1, numberOfSpheres, if( deleteFlag[j] == 0, if( printedgesonscreen == 1, print("Cell ",j," lies on the hemisphere with center at ", divideInNumberField(K,Lambda[j],Mu[j]) ); print(" with radius square ", radiusSquare[j], " and has the following edges:"); ); for( s = 1, length( pointsOfLine[j]), edge = setintersect(Set(pointsOfLine[j][s]), Set(pointsOfSphere[j]:list)); if(length(edge) == 2, if(printedgesonscreen == 1, print(edge); ); if( setsearch(Set(edgesCheckList1),edge), if(setsearch(Set(edgesCheckList2),edge), if (printedgesonscreen == 1, print("***Error in function compareSides: triple edge in cell diagram"); ); , listput(edgesCheckList2,edge); ); , /* else not yet entered in edgesCheckList1 */ listput(edgesCheckList1,edge); ); ); if(length(edge) > 2, print("***Error in function compareSides: edge with three corners"); ); ); ); ); if(Set(edgesCheckList1) == Set(edgesCheckList2), print("All ", length(edgesCheckList1), " = ", length(edgesCheckList2)," edges appear twice."); if( length(edgesCheckList1) > 3, cancelCriterion = 1; , cancelCriterion = 0; ); , /* else some edges do not appear twice. */ print("Some edges do not appear twice:"); print(setminus(Set(edgesCheckList1),Set(edgesCheckList2))); ); listkill(edgesCheckList1); listkill(edgesCheckList2); /* Return */ cancelCriterion}')
When I run this in Sage it shows a PARI/GP error and outputs the whole code. I have been trying to find the bug since the last 3 days. Please help me regarding this. Thank you.MathematicianMon, 18 Jun 2018 02:20:09 -0500http://ask.sagemath.org/question/42638/HUGE delay in sage.crypto.sbox.SBox method nonlinearity() introduced in v.8.2http://ask.sagemath.org/question/42492/huge-delay-in-sagecryptosboxsbox-method-nonlinearity-introduced-in-v82/Average time in nonlinearity() in v.8.1. was ****200 ms****
Average time in nonlinearity() in v.8.2 is ****5.1 s****
Here is the code I have used in order to track the issue:
sage: for j in range(10):
....: S = [x for x in range(256)];shuffle(S)
....: S = sage.crypto.sbox.SBox(S)
....: %time S.nonlinearity()
Results from Sage 8.1
CPU times: user 237 ms, sys: 1.87 ms, total: 239 ms
Wall time: 236 ms
94
CPU times: user 208 ms, sys: 12.5 ms, total: 220 ms
Wall time: 220 ms
94
CPU times: user 287 ms, sys: 1.41 ms, total: 288 ms
Wall time: 288 ms
92
....
Results from Sage 8.2
CPU times: user 5.12 s, sys: 30.6 ms, total: 5.15 s
Wall time: 5.16 s
92
CPU times: user 5.04 s, sys: 14.3 ms, total: 5.05 s
Wall time: 5.05 s
96
CPU times: user 5.08 s, sys: 13 ms, total: 5.09 s
Wall time: 5.09 s
94
CPU times: user 5.03 s, sys: 8.56 ms, total: 5.04 s
Wall time: 5.04 s
92
.....sageuser1Mon, 04 Jun 2018 05:23:32 -0500http://ask.sagemath.org/question/42492/how to sage a filehttp://ask.sagemath.org/question/41569/how-to-sage-a-file/I have Windows 10 installed and i can't sage a file example.sage which is in K:\sageexample
Tutorial is extremely bad and full of jargonisms and no examples in it. I don't know what does it mean to sage a file, or to run a file without example being given.
I open sage command prompt and type the following
run ('K:\sageexample\example.sage') but it returns
ERROR:root:File `u'(K:\\sageexample\\example.sagetex.sage).py'` not found.
then i use load ('K:\sageexample\example.sage") it returns nothing at all.
I spent three days trying different combinations of syntax with no result. kate_l196Thu, 15 Mar 2018 12:41:38 -0500http://ask.sagemath.org/question/41569/does as_permutation_group() respect generators?http://ask.sagemath.org/question/40927/does-as_permutation_group-respect-generators/From sage documentation I can construct a group as follows:
sage: m1 = matrix(GF(11), [[1,2],[3,4]])
sage: m2 = matrix(GF(11), [[1,3],[10,0]])
sage: G = MatrixGroup(m1, m2); G
Matrix group over Finite Field of size 11 with 2 generators (
[1 2] [ 1 3]
[3 4], [10 0]
)
Now I use the following code:
sage: G_p=G.as_permutation_group(); G_p
Permutation Group with generators [(1,2,3,4,5,6,7,8,9,10,11)(12,13,15,14,16)(17,18), (1,3,5,7,9,11,2,4,6,8,10)(12,14,13,16,15)(17,18)]
In this case it is true that the generators of G are in correspondence with the generators of G_p. Is this always the case? I mean, if I compute a very complicated group G with lots of generators and its corresponding permutation group G_p, then is it true that G.gens()[i] corresponds to G_p.gens[i]?amontero90Thu, 01 Feb 2018 13:20:47 -0600http://ask.sagemath.org/question/40927/