[GAP Forum] "SimpleGroup" command

[arashrafi at kashanu.ac.ir]

Dear Sara,

The character table of "J4" can be computed by the following command:

gap> CharacterTable("j4");

For sporadic groups, it is possible to work with character tables (and no with groups other than Mathieu groups). But, a permutation or 
matrix representation for some sporadic groups are recorded in 
ATLAS of Finite Group Representations - Version 3 (http://brauer.maths.qmul.ac.uk/Atlas/v3/spor/). You can copy  a generator set for "j4" from ATLAS and then paste into GAP. But you need a good computer.

I hope this help you.

Regards, Alireza




----- Original Message -----
From: "Sara Dikson" <s.dikson2016 at gmail.com>
To: forum at gap-system.org
Sent: Monday, April 18, 2016 11:56:19 PM
Subject: [GAP Forum] "SimpleGroup" command

Dear Forum
I used the "SimpleGroup("J4");" command for the Janko group.
But Gap can't recognize it. Also I used "AtlasGroup("J4");" but it
return "fail". I try it for "J3" but it return "fail".​
errorg.png
<https://drive.google.com/file/d/0ByRpdyuq_c_ZdkJ3Q2xnMXpLMFE/view?usp=drive_web>
​ How can I access to all simple groups?
I send the error as an attachment.
Best regards
Sara
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