Shintani zeta function

In mathematics, a Shintani zeta function or Shintani L-function is a generalization of the Riemann zeta function. They were first studied by Takuro Shintani (1976). They include Hurwitz zeta functions and Barnes zeta functions.

DefinitionEdit

Let   be a polynomial in the variables   with real coefficients such that   is a product of linear polynomials with positive coefficients, that is,  , where

 
where  ,   and  . The Shintani zeta function in the variable   is given by (the meromorphic continuation of)
 

The multi-variable versionEdit

The definition of Shintani zeta function has a straightforward generalization to a zeta function in several variables   given by

 
The special case when k = 1 is the Barnes zeta function.

Relation to Witten zeta functionsEdit

Just like Shintani zeta functions, Witten zeta functions are defined by polynomials which are products of linear forms with non-negative coefficients. Witten zeta functions are however not special cases of Shintani zeta functions because in Witten zeta functions the linear forms are allowed to have some coefficients equal to zero. For example, the polynomial   defines the Witten zeta function of   but the linear form   has  -coefficient equal to zero.

ReferencesEdit

  • Hida, Haruzo (1993), Elementary theory of L-functions and Eisenstein series, London Mathematical Society Student Texts, 26, Cambridge University Press, ISBN 978-0-521-43411-9, MR 1216135, Zbl 0942.11024
  • Shintani, Takuro (1976), "On evaluation of zeta functions of totally real algebraic number fields at non-positive integers", Journal of the Faculty of Science. University of Tokyo. Section IA. Mathematics, 23 (2): 393–417, ISSN 0040-8980, MR 0427231, Zbl 0349.12007