Timeline for Linking the residual finiteness of $G$ with $Aut(G)$ or $Out(G)$
Current License: CC BY-SA 3.0
6 events
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| Oct 6, 2011 at 18:26 | comment | added | user6976 | @Ashot: It follows from Anna's construction, I think. The Out of Grigorchuk's group is a direct product of ${\mathbb Z}_2$ (Grigorchuk-Sidki), and the Out of Erschler's extension can be described explicitly. There are many (continuum) groups, and at least for some of them Out is residually finite. But I did not check carefully all the details. | |
| Oct 6, 2011 at 18:19 | comment | added | Ashot Minasyan | Mark, how do you show that Aut of Erschler's example is residually finite? I can see that it is finite-by-(res. finite), but this is not enough in general... | |
| Sep 30, 2011 at 10:29 | vote | accept | ADL | ||
| Sep 29, 2011 at 17:23 | history | edited | user6976 | CC BY-SA 3.0 |
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| Sep 29, 2011 at 15:40 | history | edited | user6976 | CC BY-SA 3.0 |
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| Sep 29, 2011 at 15:19 | history | answered | user6976 | CC BY-SA 3.0 |