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I want to use the well-known coxeter3 package (http://math.univ-lyon1.fr/~ducloux/coxeter/coxeter3/english/coxeter3_e.html) in sage-notebook. I've tried 'i' and 'f' but doesn't work, so far I couldn't find a 'good' answer online.

How to install the package so that I can use it in sage-notebook?

Sylvester W. Zhang
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    You can try running the Coxeter package on SageMathCloud https://cocalc.com/ or contact sage support: http://www.sagemath.org/help.html . In particular, ask your question to the google group: https://groups.google.com/forum/#!forum/sage-support – Mee Seong Im Apr 27 '18 at 02:34
  • Software installation is not on-topic here, even for packages commonly used by mathematicians. However using coxeter3 or similar Sage extensions to accomplish a specific mathematical task could well be on-topic. – hardmath Apr 28 '18 at 02:02

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If you installed Sage from source or from a binary for Linux or macOS, you should be able to install the coxeter3 package by opening a terminal and running

sage -i coxeter3

(type sage -i coxeter3 and hit the RETURN or ENTER key).

Providing you have the necessary development tools available, this will install the package for your version of Sage, and next time you start either the Sage REPL (read-eval-print loop, or command-line interface in the terminal), or the SageNB notebook, or the Jupyter notebook with the SageMath kernel, you will be able to use the functionality of the coxeter3 package.

This also assumes that your shell is configured so that when you type sage in a terminal, this launches Sage.

If this is not the case, you need to open a terminal and run something like

sudo ln -sf /path/to/sagedir/sage /usr/local/bin

where /path/to/sagedir should be replaced by the path to the Sage directory (and you might need to type in your user password for your user account on that Mac). If you don't know what the path is to the Sage directory, you can obtain it by launching Sage and running, in Sage,

print SAGE_ROOT
Samuel Lelièvre
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  • I did '$ sage -i coxeter3' in the (mac) terminal as you said, what I got is ' -bash: -i: command not found ' – Sylvester W. Zhang Apr 27 '18 at 18:55
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    @W.Z.Zhang -- I edited my answer. Please try again. – Samuel Lelièvre Apr 27 '18 at 21:53
  • Leilièvre -- Thanks for your help, after doing this: now if I type 'sage' in the terminal, It will not give me' -bash: sage: command not found', which is good, but still when I do' sage -i', I get '-bash: -i: command not found' – Sylvester W. Zhang Apr 27 '18 at 23:09
  • I am puzzled by the bash error you get. As an alternative, you could start Sage (either using the Sage REPL, the SageNB notebook, or the Jupyter notebook with the SageMath kernel), and run !sage -i coxeter3 (starting a command with ! inside Sage lets you run a shell command from within Sage). – Samuel Lelièvre Apr 27 '18 at 23:17
  • This is what I got for '! sage -i coxeter3' ----" xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun " And I've updated the question . thanks a lot – Sylvester W. Zhang Apr 27 '18 at 23:27