English

A Discrete Proof of The General Jordan-Schoenflies Theorem

General Topology 2020-07-28 v5

Abstract

In the early 1960s, Brown and Mazur proved the general Jordan-Schoenflies theorem. This fundamental theorem states: If we embed an (n1)(n-1) sphere S(n1)S^{(n-1)} locally flatly in an nn sphere SnS^{n}, then it decomposes SnS^{n} into two components. In addition, the embedded S(n1)S^{(n-1)} is the common boundary of the two components and each component is homeomorphic to the nn-ball.\newline This paper gives a constructive proof of the theorem using the discrete method. More specifically, we prove the equivalent statements: Let MM be an nn-manifold, which is homeomorphic to SnS^{n}. Then, every (n1)(n-1)-manifold SS, a submanifold with local flatness in MM, decomposes the space MM into two components where each component is homeomorphic to an nn-ball. The method was chosen in order to evaluate the computability and computational costs among operations between cells regarding homeomorphism. In addition, methods within the proof can be extended to applications in design algorithms under the assumption that homeomorphic mappings are constructible and computable. In this new revision, We add some new detailed discussions.

Keywords

Cite

@article{arxiv.1504.05263,
  title  = {A Discrete Proof of The General Jordan-Schoenflies Theorem},
  author = {Li Chen and Steven G. Krantz},
  journal= {arXiv preprint arXiv:1504.05263},
  year   = {2020}
}

Comments

50 pages ; 16 figures; the new revised version. In this revision, we mainly made some writing improvement and did the extra discussion on the last theorem