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arXiv 2007.04742math.NT
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流形上加权同时可逼近点集的豪斯多夫维数的一个下界

A lower bound for the Hausdorff dimension of the set of weighted simultaneously approximable points over manifolds

Victor Beresnevich, Jason Levesley, Benjamin Ward

摘要:

给定一个权向量$τ=(τ_{1}, \dots, τ_{n}) \in \mathbb{R}^{n}_{+}$,每个$τ_{i}$受一定的约束,我们得到了流形$\mathcal{M}$上$τ$ -可逼近点集的豪斯多夫维数的一个下界,其中$\mathcal{M}$是二次连续可微的.由此,我们产生一个下界的集合$ψ$ -逼近点的流形上,其中$ψ$是一个一般的近似函数与某些限制。证明是基于Beresnevich等人在arXiv:1712.03761中开发的技术,但我们使用了另一种质量转移类型定理。

英文摘要:

Given a weight vector $τ=(τ_{1}, \dots, τ_{n}) \in \mathbb{R}^{n}_{+}$ with each $τ_{i}$ bounded by certain constraints, we obtain a lower bound for the Hausdorff dimension of the set of $τ$-approximable points points over a manifold $\mathcal{M}$, where $\mathcal{M}$ is twice continuously differentiable. From this we produce a lower bound for the set of $ψ$-approximable points over a manifold where $ψ$ is a general approximation function with certain limits. The proof is based on a technique developed by Beresnevich et al. in arXiv:1712.03761, but we use an alternative mass transference style theorem.

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