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research article

Lattice packings through division algebras

Gargava, Nihar Prakash  
January 1, 2023
Mathematische Zeitschrift

In this text, we will show the existence of lattice packings in a family of dimensions by employing division algebras. This construction is a generalization of Venkatesh's lattice packing result Venkatesh (Int Math Res Notices 2013(7): 1628-1642, 2013). In our construction, we replace the appearance of the cyclotomic number field with a division algebra over the rational field. We employ a probabilistic argument to show the existence of lattices in certain dimensions with good packing densities. The approach improves the best known lower bounds on the lattice packing problem for certain dimensions.We work with a moduli space of lattices that are invariant under the action of a finite group, one that can be embedded inside a division algebra. To obtain our existence result, we prove a division algebra variant of the Siegel's mean value theorem. In order to establish this, we describe a useful description of the Haar measure on our moduli space and a coarse fundamental domain to perform the integration.

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Type
research article
DOI
10.1007/s00209-022-03157-7
Web of Science ID

WOS:000898485600003

Author(s)
Gargava, Nihar Prakash  
Date Issued

2023-01-01

Publisher

SPRINGER HEIDELBERG

Published in
Mathematische Zeitschrift
Volume

303

Issue

1

Start page

18

Subjects

Mathematics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
TN  
Available on Infoscience
January 16, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/193702
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