Uniformity and Functional Equations for Local Zeta Functions of $\mathfrak{K}$-Split Algebraic Groups

Details Uniformity and Functional Equations for Local Zeta Functions of $\mathfrak{K}$-Split Algebraic Groups Uniformity and Functional Equations for Local Zeta Functions of $\mathfrak{K}$-Split Algebraic Groups

2008-02-28

arxiv.org/abs/0802.4207v2

Mathematics

Group Theory

22 pages

Scientific paper

We study the local zeta functions of an algebraic group $\mathcal{G}$ defined over $\mathfrak{K}$ together with a faithful $\mathfrak{K}$-rational representation $\rho$ for a finite extension $\mathfrak{K}$ of $\mathbb{Q}$. These are given by integrals over $\mathfrak{p}$-adic points of $\mathcal{G}$ determined by $\rho$ for a prime $\mathfrak{p}$ of $\mathfrak{K}$. We prove that the local zeta functions are almost uniform for all $\mathfrak{K}$-split groups whose unipotent radical satisfies a certain lifting property. This property is automatically satisfied if $\mathcal{G}$ is reductive. We provide a further criterion in terms of invariants of $\mathcal{G}$ and $\rho$ which guarantees that the local zeta functions satisfy functional equations for almost all primes of $\mathfrak{K}$. We obtain these results by using a $\mathfrak{p}$-adic Bruhat decomposition of Iwahori and Matsumoto [IM] to express the zeta function as a weighted sum over the Weyl group $W$ associated to $\mathcal{G}$ of generating functions over lattice points of a polyhedral cone. The functional equation reflects an interplay between symmetries of the Weyl group and reciprocities of the combinatorial object. We construct families of groups with representations violating our second structural criterion whose local zeta functions do not satisfy functional equations. Our work generalizes results of Igusa [Igu] and du Sautoy and Lubotzky [dSL] and has implications for zeta functions of finitely generated torsion-free nilpotent groups.

Affiliated with

Also associated with

No associations

Rating

Uniformity and Functional Equations for Local Zeta Functions of $\mathfrak{K}$-Split Algebraic Groups does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Uniformity and Functional Equations for Local Zeta Functions of $\mathfrak{K}$-Split Algebraic Groups, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Uniformity and Functional Equations for Local Zeta Functions of $\mathfrak{K}$-Split Algebraic Groups will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-471882