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This introduction to matrix algebra will be found of particular value to students working for B.Sc. and similar examinations. The matrix algebra commonly used in physics is presented in Chapters 1-7, but for a preliminary survey it is sufficient to consider only Sections 1-5, 7, 11, 15, 16, 19-23 and 25. Readers are assumed to have an elementary knowledge of vectors and complex numbers. Apart from that, arguments involve hardly anything but addition and multiplication. The application of matrices to various fields of physics is presented in the second half of the book. A number of examples are worked out in detail. They require a fair knowledge of the calculus; in some places even Fourier transforms and contour integration are used. No instructions for this kind of analysis are given since it happens to be better known than algebraic methods, even though the latter arc more elementary