Cohomologie Locale Des Faisceaux Coherents (Sga 2): Seminaire De Geometrie Algebrique Du Bois Marie 1962 (Documents Mathematiques)
《Cohomologie Locale Des Faisceaux Coherents (Sga 2): Seminaire De Geometrie Algebrique Du Bois Marie 1962 (Documents Mathematiques)》 · 第 31 页 · Section 3.2「Orthogonality Relations and Bilinear Forms」
A class function on $G$ is a function $G\to\mathbb C$ that is constant on each conjugacy class of $G$.