Lifting, restricting and sifting integral points on affine homogeneous varieties

Details Lifting, restricting and sifting integral points on affine homogeneous varieties Lifting, restricting and sifting integral points on affine homogeneous varieties

2010-09-27

arxiv.org/abs/1009.5217v1

Mathematics

Number Theory

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Scientific paper

In a previous paper {GN2} an effective solution of the lattice point counting problem in general domains in semisimple S-algebraic groups and affine symmetric varieties was established. The method relies on the mean ergodic theorem for the action of G on G/Gamma, and implies uniformity in counting over families of lattice subgroups admitting a uniform spectral gap. In the present paper we extend some methods developed in {NS} and use them to establish several useful consequences of this property, including : Effective upper bounds on lifting for solutions of congruences in affine homogeneous varieties, effective upper bounds on the number of integral points on general subvarieties of semisimple group varieties, effective lower bounds on the number of almost prime points on symmetric varieties, and effective upper bounds on almost prime solutions of Linnik-type congruence problems in homogeneous varieties.

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