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Ergodic Theory on Homogeneous Spaces and Metric Number Theory

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Article Outline

Glossary

Definition of the Subject

Introduction

Basic Facts

Connection with Dynamics on the Space of Lattices

Diophantine Approximation with Dependent Quantities: The Set-Up

Further Results

Future Directions

Acknowledgment

Bibliography

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Abbreviations

Diophantine approximation :

Diophantine approximation refers to approximation of real numbers by rational numbers, or more generally, finding integer points at which some (possibly vector‐valued) functions attain values close to integers.

Metric number theory :

Metric number theory (or, specifically, metric Diophantine approximation) refers to the study of sets of real numbers or vectors with prescribed Diophantine approximation properties.

Homogeneous spaces:

A homogeneous space \({G/\Gamma}\) of a group G by its subgroup Γ is the space of cosets \({\{g\Gamma\}}\). When G is a Lie group and Γ is a discrete subgroup, the space \({G/\Gamma}\) is a smooth manifold and locally looks like G itself.

Lattice; unimodular lattice :

A lattice in a Lie group is a discrete subgroup of finite covolume; unimodular stands for covolume equal to 1.

Ergodic theory :

The study of statistical properties of orbits in abstract models of dynamical systems.

Hausdorff dimension :

A nonnegative number attached to a metric space and extending the notion of topological dimension of “sufficiently regular” sets, such as smooth submanifolds of real Euclidean spaces.

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Acknowledgment

The work on this paper was supported in part by NSF Grant DMS-0239463.

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Kleinbock, D. (2012). Ergodic Theory on Homogeneous Spaces and Metric Number Theory. In: Meyers, R. (eds) Mathematics of Complexity and Dynamical Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-1806-1_19

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