plural of Gordan

A surname.

(mathematics) The problem of generalizing Paul Gordan's computational approach to the theorem of the finiteness of generators for binary forms to work with functions having more than two variables.

plural of Clebsch-Gordan coefficient

(physics) Any of a class of numbers that arise in angular momentum coupling in quantum mechanics. They appear as the expansion coefficients of total angular momentum eigenstates in an uncoupled tensor product basis.