• br Author contributions br Acknowledgements The

  2022-01-03

  

  Author contributions Acknowledgements The work was supported in part by Natural Science Foundation of China (31601995, 31501028) and an internal research grant of Jianghan University (14042). The authors thank HY of Jingchu University of technology for revising the manuscript. Introduction

• br Introduction Topological hedgehogs keep generating intere

  2022-01-03

  

  Introduction Topological hedgehogs keep generating interest in point-set topology as they are a rich source of counterexamples and applications (for a comprehensive survey on topological hedgehogs we refer to [1]; see also [9]). They may be described as a set of spines identified at a single poin

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