Timeline for Lie algebra elements commuting with a principal nilpotent element
Current License: CC BY-SA 4.0
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| Jul 17, 2019 at 9:52 | comment | added | AThomas | Thank you YCor for the counter example. But still, I have the impression that for every Lie algebra $\mathfrak{g}$ there is a irreducible representation r such that equality holds in the right inclusion. For $\mathfrak{sl}_3$ it is the standard representation. I will edit the question. | |
| Jul 16, 2019 at 18:34 | history | answered | YCor | CC BY-SA 4.0 |