acting on a certain Hilbert space. It is thus natural to speak of the discrete spectrum of the Hamiltonian. The emission or absorption bands correspond
is a branch of mathematics concerning the study of finite or countable discrete structures. Combinatorics and Algebraic Geometry have enjoyed a fruitful
manipulations) for the problems of mathematical analysis (as distinguished from discrete mathematics). CONTENT : A - F , G - L , M - R , S - Z , See also , External