Diophantine approximation exponents on homogeneous varieties
Diophantine approximation exponents on homogeneous varieties
复制标题
同质品种的丢番图近似指数
DOI:
10.1090/conm/631/12603
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
A. Nevo
中科院分区:
文献类型:
--
作者:
Anish Ghosh;A. Gorodnik;A. Nevo
Recent years have seen very important developments at the interface of Diophantine approximation and homogeneous dynamics. In the first part of the paper we give a brief exposition of a dictionary developed by Dani and Kleinbock-Margulis which relates Diophantine properties of vectors to distribution of orbits of flows on the space of unimodular lattices. In the second part of the paper we briefly describe an extension of this dictionary recently developed by the authors, which establishes an analogous dynamical correspondence for general lattice orbits on homogeneous spaces. We concentrate specifically on the problem of estimating exponents of Diophantine approximation by arithmetic lattices acting on algebraic varieties. In the third part of the paper, we exemplify our results by establishing explicit bounds for the Diophantine exponent of dense lattice orbits in a number of basic cases.
These include the linear and affine actions on affine spaces, and the action on the variety of matrices of fixed determinant. In some cases, these exponents are shown to be best possible.
影响因子:
1.8
作者:
Ghosh A
通讯作者:
Ghosh A
影响因子:
1
作者:
Ghosh A
通讯作者:
Ghosh A