Timeline for Extensions of $SL(2,\mathbb{F}_q)$

12 events

when toggle format	what		by	license	comment
May 5, 2015 at 16:25	vote	accept	CommunityBot
May 5, 2015 at 16:25	vote	accept	CommunityBot
May 5, 2015 at 16:25
May 5, 2015 at 11:54	answer	added	Derek Holt		timeline score: 9
May 5, 2015 at 3:45	vote	accept	CommunityBot
May 5, 2015 at 16:25
May 5, 2015 at 3:41	vote	accept	CommunityBot
May 5, 2015 at 3:45
May 5, 2015 at 1:56	answer	added	Qiaochu Yuan		timeline score: 2
May 5, 2015 at 1:48	comment	added	Nick Gill		If $q$ is even and bigger than $2$, then $SL(2,q)$ is simple and things are easy: you always have $SL(2,q)\times C_2$, and if $q$ is a square you will have an almost simple group, and these are all the possibilities. If $q$ is odd, then you are talking about bicyclic extensions of $PSL(2,q)$ and the notion of ISOCLINISM makes things a little more tricky. I recommend you read the introduction of the ATLAS for an excellent discussion of this. (I have an e-copy of the ATLAS if you need it.)
May 5, 2015 at 1:15	comment	added	Qiaochu Yuan		The standard terminology is that if $1 \to N \to G \to H \to 1$ is a short exact sequence, then $G$ is an extension of $H$ by $N$ (in your title you use "of" to refer to $N$).
S May 5, 2015 at 0:45	history	suggested	Spencer Leslie	CC BY-SA 3.0	Made the group clearer.
May 4, 2015 at 23:04	review	Suggested edits
S May 5, 2015 at 0:45
May 4, 2015 at 22:54	review	First posts
May 4, 2015 at 23:08
May 4, 2015 at 22:53	history	asked	user71114	CC BY-SA 3.0