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I just finished a quick primer for my class on Advanced QFT on Representations of Lie algebras and useful facts about them. Here is a link to the lecture notes. It’s a hands on approach with no proofs, but at least it makes various concepts a little bit more accessible and can serve for a quick reminder of basic stuff like what is a Dynkin diagram and labels of various representations. The notes cover mostly ┬áSU(N), but various concepts are quite general.

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