This textbook explains the fundamental concepts and techniques of group theory by making use of language familiar to physicists. Calculation methods in the context of physics are emphasized. New materials drawn from the teaching and research experience of the author are included. The generalized Gel''fand''s method is presented to calculate the matrices of irreducible representations of the simple Lie algebra and its Clebsch–Gordan coefficients. This book is for graduate students and young researchers in physics, especially theoretical physics. It is also for graduate students in theoretical chemistry.Key Features: ○Both the theoretical framework of group theory and the calculation technique in physics are emphasized and explained by language familiar to physicists○The generalized Gel''fand''s method is presented and explained in detail by examples for the simple Lie algebras○The irreducible bases of the symmetry group of a regular icosahedron are calculated explicitly through its isomorphic relation with the alternative subgroup of the permutation group of five objects○Only based on the translation symmetry of crystals, the crystals are classified completely, and the irreducible representations of the space groups are calculatedAn exercise book "Problems and Solutions in Group Theory for Physicists" (published by World Scientific in 2004) to form a complete set on group theory
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