R Shankar has introduced major additions and updated key presentations in this second edition of Principles of Quantum Mechanics New features of this innovative text include an entirely rewritten mathematical introduction, a discussion of Time reversal invariance, and extensive coverage of a variety of path integrals and their applications Additional highlights includeClear, accessible treatment of underlying mathematicsA review of Newtonian, Lagrangian, and Hamiltonian mechanicsStudent understanding of quantum theory is enhanced by separate treatment of mathematical theorems and physical postulatesUnsurpassed coverage of path integrals and their relevance in contemporary physicsThe requisite text for advanced undergraduate and graduate level students, Principles of Quantum Mechanics, Second Edition is fully referenced and is supported by many exercises and solutions The book s self contained chapters also make it suitable for independent study as well as for courses in applied disciplines