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Before diving into the solutions, it is helpful to understand why this book is so widely used in graduate and advanced undergraduate programs. Shankar organizes the universe of quantum mechanics into several foundational pillars:
During his lectures at Yale, Shankar often humored his students with a "Feynman-esque" perspective on the manual and the subject. He once joked that his goal was to reach a point where everyone found quantum mechanics completely incomprehensible
Use symmetries and conserved quantities