二元函数作为一元函数之和的构造性分解
Constructive decomposition of a function of two variables as a sum of functions of one variable
摘要:
给定一个平面上的紧集$K$,它不包含任何形成垂直和水平段的点的三元组,以及一个映射$f\in C(K)$,我们给出了一个函数$g,h\in C(\mathbb R)$的构造,使得对所有$(x,y)\in K$都有$f(x,y)=g(x)+h(y)$.这提供了一个建设性的证明的一部分Sternfeld定理的基本嵌入在平面上。在我们的证明中,集合$K$被一个有限集的点近似。
英文摘要:
Given a compact set $K$ in the plane, which does not contain any triple of points forming a vertical and a horizontal segment, and a map $f\in C(K)$, we give a construction of functions $g,h\in C(\mathbb R)$ such that $f(x,y)=g(x)+h(y)$ for all $(x,y)\in K$. This provides a constructive proof of a part of Sternfeld's theorem on basic embeddings in the plane. In our proof the set $K$ is approximated by a finite set of points.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。