a course textbook?

I have taught once a group of particle physics graduate students who had never had an orthodox Lie Algabra course, and they became master birdtrackers, doing exceptional Lie group calculations like done here was as easy as a 2nd year undergraduate E&M course.
 
For non-particle physics students (condensed matter, math, engineering) this book is suited only for the 2nd half of the semester: one needs to teach the finite groups first. See this course as an example.
 
The difficult task is to teach this to people already fully indoctrinated in Cartan weights and Dynkin diagrams.

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