Autor:	David A. Herron
Rok vydání:	2020
Předmět:	Metric space Pure mathematics Hadamard transform Covering space Plane (geometry) General Mathematics Metric (mathematics) Radius Domain (mathematical analysis) Mathematics
Zdroj:	Revista Matemática Iberoamericana. 37:1277-1306
ISSN:	0213-2230
DOI:	10.4171/rmi/1226
Popis:	We prove that the natural metric universal cover of a quasihyperbolic plane domain is a Hadamard metric space with injectivity radius π. This in turn provides sharp constants for several conjectures by Vaisala.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d9540a42e2f7847b520acb310687d99 https://doi.org/10.4171/rmi/1226 Zobrazit plný text záznamu