books.google.com - This volume will serve several purposes: to provide an introduction for graduate students not previously acquainted with the material, to serve as a reference for mathematical physicists already working in the field, and to provide an introduction to various advanced topics which are difficult to understand...http://books.google.com/books/about/Methods_of_modern_mathematical_physics_2.html?id=Kz7s7bgVe8gC&q=subspace&utm_source=gb-gplus-shareMethods of modern mathematical physics. 2. Fourier analysis, self-adjointness

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## Methods of modern mathematical physics. 2. Fourier analysis, self-adjointnessBy Michael Reed, Barry Simon |