Timeline for Hopfian and Co-Hopfian groups (examples)
Current License: CC BY-SA 2.5
3 events
| when toggle format | what | by | license | comment | |
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| Sep 16, 2021 at 17:48 | comment | added | YCor | I think arbitrary compact $p$-adic Lie groups are Hopfian (as top. groups). A sufficient condition for a compact $p$-adic Lie group to be cohopfian is that the automorphism group of its Li algebra is volume preserving. This is indeed the case when the Lie algebra is semisimple (which is equivalent to your assumption). | |
| Sep 12, 2021 at 9:54 | history | made wiki | Post Made Community Wiki by Stefan Kohl♦ | ||
| Mar 27, 2011 at 15:08 | history | answered | Colin Reid | CC BY-SA 2.5 |