Timeline for Automorphisms of the Lie algebras $\mathfrak{sl}(2,R)$ and $\mathfrak{su}(2)$
Current License: CC BY-SA 3.0
9 events
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| Mar 1, 2018 at 18:34 | comment | added | Marco Farinati | I'm sorry to introduce this mistake! we had in mind the complex case, where outer automorphisms are controled by automorphisms of the Dynkin Diagram, that is trivial in the sl2 case, but over the complex.. | |
| Aug 24, 2017 at 15:10 | comment | added | YCor | Maybe you first want to define what an inner automorphism is. It can be defined as an automorphism in the group generated by the $\exp(\mathrm{ad}(x))$, where $x$ ranges over ad-nilpotent elements. But in the case of $SU(2)$ it makes a problem: only $x$ is such an element. The question you link also does not bother with giving a definition. | |
| Aug 24, 2017 at 14:16 | history | edited | Javier | CC BY-SA 3.0 |
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| Aug 24, 2017 at 13:56 | vote | accept | Javier | ||
| Aug 24, 2017 at 12:56 | answer | added | Ben McKay | timeline score: 13 | |
| Aug 24, 2017 at 12:33 | history | edited | Javier | CC BY-SA 3.0 |
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| S Aug 24, 2017 at 11:00 | history | edited | Javier | CC BY-SA 3.0 |
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| Aug 24, 2017 at 11:00 | review | Suggested edits | |||
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| Aug 24, 2017 at 10:55 | history | asked | Javier | CC BY-SA 3.0 |