In this note, we give a self-contained and elementary proof of the elementary construction of spectral high-dimensional expanders using elementary matrices due to Kaufman and Oppenheim [Proc. 50th ACM Symp. on Theory of Computing (STOC), 2018]. As a bonus, this also yields a simple construction and analysis of standard expanders.
翻译:在本说明中,我们给出了利用Kaufman和Oppenheim[2018年关于计算理论(STOC)的ACM第50号文件]基础矩阵进行光谱高维扩张器基本构造的自足和基本证据。作为奖金,这也产生了对标准扩张器的简单构建和分析。