2026-03-23T10:28:49Z https://yabu.me Paul Schwahn https://yabu.me/npub1zz2mah7y6j4nld7dwedl7eh0yph4swkkv88spuvh0urq32xgz3ws459mhx https://media.mathstodon.xyz/accounts/avatars/110/770/677/475/271/847/original/fbf2251d60044440.png https://media.mathstodon.xyz/accounts/avatars/110/770/677/475/271/847/original/fbf2251d60044440.png https://yabu.me/nevent1qqszftnun4pzyj6972s26jxrgwgz40mzmkm7j7yaz35ld3vw56dqj5czyqgft0klcn22k0ahe4m9hlmxausx7kp66esu7q83jalsvz9geq296y9syq7 In reply to <a href='/nevent1qqsysq2tx066ftxywmju4rx9z6rwex96fptamrgvlxkd358zwun8s0s6ggths'>nevent1q…gths</a><br/>_________________________<br/><br/>Hmm, I don&#39;t even know what the Dynkin index would mean for a non-simple subalgebra - the Killing forms of 𝔣₄ and the subalgebra will certainly not be proportional. There&#39;s also this interpretation in terms of π₃ - but I am a lower geometer and have no understanding of π₃ ;)<br/>So, I am sorry to be of no help here... 2025-09-21T07:57:35Z