Timeline for When are isomorphic copies of the base group in an $HNN$-extension subgroups of the base group (up to conjugacy)?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| May 14, 2012 at 9:43 | vote | accept | ADL | ||
| Nov 24, 2011 at 11:58 | comment | added | Benjamin Steinberg | Property FA is equivalent to having your property for both HNN extensions and amalgamations I believe. I am not sure whether having this for HNN alone is enough though I expect it is by contracting an appropriate forest in the Bass-Serre tree. | |
| Nov 24, 2011 at 11:41 | comment | added | ADL | So...groups with property FA are the only groups which have the property in my question? (I.e. having property FA is equivalent to the property I am wondering about?) | |
| Nov 24, 2011 at 11:26 | history | answered | Benjamin Steinberg | CC BY-SA 3.0 |