Siegel G-function

The Siegel G-function is a complex function that arises in the theory of analytic number theory, particularly in the area of modular forms and automorphic forms. It is named after the German mathematician Carl Ludwig Siegel, who made significant contributions to number theory and related fields. In a broad sense, the Siegel G-function can be viewed as a generalization of the classical gamma function and is associated with several variables.