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The writing style is unique. It is not "chatty" or hand-holding. It is terse, rigorous, and efficient. It assumes you are comfortable with linear algebra and quantum mechanics.
Tung’s book is not a one-week read. It is a book you will keep on your shelf—physical or digital—for decades. The derivations of the Casimir operators of SO(n), the careful discussion of the universal covering group, and the tables of representation dimensions are reference material you will constantly revisit. Wu-ki Tung Group Theory In Physics Pdf
Furthermore, the problems in the back are designed to be worked out on paper. A scanned, blurry PDF makes this miserable. A proper PDF (purchased) or a physical copy allows you to flip between the text, the table of contents, and the index seamlessly. The writing style is unique
Chapters 5 through 8 form the heart of the book. Tung provides a masterclass on Lie groups, explaining: It assumes you are comfortable with linear algebra