On some modifications of the Niemytzki plane
General Topology
2025-06-03 v1
Abstract
We present a criterion that compares modifications of the Niemytzki plane. It follows that if usual tangent discs of the Niemytzki plane are replaced by triangles with bounded angles, then the resulting space is not homeomorphic to the former.
Cite
@article{arxiv.2506.01707,
title = {On some modifications of the Niemytzki plane},
author = {Wojciech Bielas},
journal= {arXiv preprint arXiv:2506.01707},
year = {2025}
}