Functional equations for local normal zeta functions of nilpotent groups

Voll, C. and Beauville, A. (2005) Functional equations for local normal zeta functions of nilpotent groups. Geometric And Functional Analysis, 15 (1), 274-295. (doi:10.1007/s00039-005-0506-y).

Abstract

We give explicit formulae for the local normal zeta functions of torsion-free, class-2-nilpotent groups, subject to conditions on the associated Pfaffian hypersurface which are generically satisfied by groups with small centre and sufficiently large abelianization. We show how the functional equations of two types of zeta functions - the Weil zeta function associated to an algebraic variety and zeta functions of algebraic groups introduced by Igusa - match up to give a functional equation for local normal zeta functions of groups. We also give explicit formulae and derive functional equations for an infinite family of class-2-nilpotent groups known as Grenham groups, confirming conjectures of du Sautoy.

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