English

Constructing Displacement Vectors

Number Theory 2024-09-25 v1

Abstract

Let vR2Q2\overrightarrow{v}\in\mathbb{R}^2\setminus\mathbb{Q}^2, let \lVert\cdot\lVert be an arbitrary norm on R2\mathbb{R}^2, and let (qn,pn)n=0N×Z2(q_n,\overrightarrow{p_n})_{n=0}^{\infty} \subset\mathbb{N}\times\mathbb{Z}^{2} be the best approximation vectors sequence of v\overrightarrow{v} with respect to \lVert\cdot\lVert. We define the nth long displacement vector of v\overrightarrow{v} to be βn:=qn+1(qnvpn)\overrightarrow{\beta_n}:=\sqrt{q_{n+1}}(q_{n}\overrightarrow{v}-\overrightarrow{p_n}) and prove the existence of long displacement vectors who have non-typical properties, focusing on their length, direction, and congruence class.

Keywords

Cite

@article{arxiv.2308.03049,
  title  = {Constructing Displacement Vectors},
  author = {Alon Agin},
  journal= {arXiv preprint arXiv:2308.03049},
  year   = {2024}
}