Carnot 群中的 Lusin 逼近与水平曲线
度量几何
2015-11-26 v4
摘要
我们证明,给定 Heisenberg 群中的一条绝对连续水平曲线 ,存在一条 水平曲线 ,使得在测度很小的集合之外 且 。反之,我们在 Engel 群中构造了一条没有 水平逼近的绝对连续水平曲线。
引用
@article{arxiv.1412.2531,
title = {Lusin Approximation and Horizontal Curves in Carnot Groups},
author = {Gareth Speight},
journal= {arXiv preprint arXiv:1412.2531},
year = {2015}
}
备注
21 pages. Corrected a technical error in the argument for the Heisenberg group and added previously omitted proofs. Improved the exposition and corrected typos as suggested by referees. To appear in Revista Matematica Iberoamericana