Timeline for When is Inn(X) simple?
Current License: CC BY-SA 2.5
9 events
| when toggle format | what | by | license | comment | |
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| Nov 24, 2010 at 8:23 | history | edited | Alex B. | CC BY-SA 2.5 |
Added link to covers of An, retracted false conjecture
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| Nov 22, 2010 at 22:01 | comment | added | Jack Schmidt | Derek's counterexample is SmallGroup(240,93): 4 Y SL(2,5). | |
| Nov 22, 2010 at 16:10 | comment | added | Alex B. | I have tried to make it clearer. | |
| Nov 22, 2010 at 16:09 | history | edited | Alex B. | CC BY-SA 2.5 |
Clarified the analysis of quasi-simple vs "simple modulo centre"
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| Nov 22, 2010 at 15:42 | comment | added | Makhalan Duff | mmm... Why are you saying that $X/X'$ is simple in the case that $X' \leq Z$? Wouldn't $Z/X'$ usually be a non-trivial normal subgroup of $X/X'$? | |
| Nov 22, 2010 at 15:11 | history | edited | Alex B. | CC BY-SA 2.5 |
Modified the reference to quasi-simple groups; added 27 characters in body
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| Nov 22, 2010 at 14:58 | comment | added | Alex B. | I first thought that this requirement was automatically satisfied, if your group isn't a direct product, but now I am not so sure. I will modify the post. But "simple modulo the centre" is definitely the term you are looking for. | |
| Nov 22, 2010 at 14:35 | comment | added | Makhalan Duff | Ah! I didn't know about quasi-simple groups. You say it's equivalent to quasi-simple? What about the requirement there that $X'=X$? In any case, it gives a nice family of examples. | |
| Nov 22, 2010 at 14:29 | history | answered | Alex B. | CC BY-SA 2.5 |