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Dec 26, 2022 at 17:25 comment added Noah Snyder I literally just mean a lowercase letter with an underline. I’m having trouble finding an example on the internet and now I’m worried maybe this is just a Berkeley thing or something. It’s definitely how I’ve done it since grad school.
Dec 26, 2022 at 16:23 comment added Timothy Chow I see now that there is another MO question that is very similar to this one: Blackboard rendering of math fonts. Also somewhat related is Fraktur symbols for Lie algebras.
Dec 26, 2022 at 16:08 comment added Wojowu I have also not seen underlines used for Lie algebras in my area (adjacent to Langlands program, where Lie algebras of algebraic groups are abundant) but one of my teachers, who specialized in representation theory of Lie algebras, did use it. So perhaps it's a notation localized to this subarea
Dec 26, 2022 at 16:00 comment added Timothy Chow This is interesting. Lie algebras make their appearance in algebraic combinatorics (my field) occasionally, but I don't recall seeing anyone using the underline convention. Then again, research talks that use a blackboard are increasingly rare anyway.
Dec 26, 2022 at 9:21 comment added BCLC may you please exhibit this eg write it take a photo upload it here?
Dec 26, 2022 at 0:19 history made wiki Post Made Community Wiki by Asaf Karagila
Dec 25, 2022 at 21:09 vote accept CommunityBot
Mar 15 at 4:46
Dec 25, 2022 at 20:38 history answered Noah Snyder CC BY-SA 4.0