Annals of Mathematics
On the Wave Equation of the Hydrogen Atom
T. H. Gronwall
Abstract
and those values of the constant E (energy levels or characteristic constants) are to be determined for which there exist solutions of (1) (characteristic functions) which are single-valued and finite everywhere. SchrodingerI solves this problem by introducing polar coordinates r, 0, 'p, whereby the equation becomes separable, and writing i = x (r) it(0, ( ), where u (0, Sp) is any one of the surface harmonics of the unit sphere