Miller, Willard _ Symmetry and separation of variables _ - Cambridge Cambridge University Press 2012 - xxx,285p. PB 22cm. - Encuclopedia of mathematics and its applications 4 . ISBN: 9780521177399 Subjects--Personal Names: _ Subjects--Uniform Titles: Symmetry (physics)functions specialdifferential eduations Dewey Class. No.: 530.155353 / MIL