[GAP Forum] egg-box

[James Mitchell]

Dear Fahima Babaee,

If you use the Semigroups package for GAP:

https://gap-packages.github.io/Semigroups/

you can draw the D-class diagram of a finite semigroup by doing:

Splash(DotDClasses(S));

As long as you have graphviz installed on your computer. If you have
graphviz installed and the above command does not work (it should, but just
in case it does not), then you can write the output of DotDClasses(S) to a
file by doing:

FileString("name-of-a-file.dot", DotDClasses(S));

and then process the resulting file in the terminal by doing:

dot -Tpdf name-of-a-file > name-of-a-file.pdf

to produce a pdf file.

Best wishes,

James

On Tue, 8 Nov 2016 at 08:46 fahime babaee <f.alibabaee at gmail.com> wrote:

> Dear forum
>
>   How can I draw the egg box of D class of a semigroup with GAP. I used
> function DrawDClasses(S,"DClasses"), but it dose not work and it ask me to
> install gsviwer but I already  have gsviwer on my system.
>
> Sincerely
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