The Borel complexity of ideal limit points

•Studying the Borel complexity of ideal limit points systematically.•Solving an open problem.•Revealing close connection of Borel complexity between ideal limit points and ideals. In this paper we mainly study the Borel complexity of ideal limit points, denoted by Λr(I), in a first countable space....

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Vydané v:	Topology and its applications Ročník 312; s. 108061
Hlavní autori:	He, Xi, Zhang, Hang, Zhang, Shuguo
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Elsevier B.V 01.05.2022
Predmet:	Borel complexity Borel ideal Farah ideal Ideal cluster points Ideal limit points secondary Borel ideal Farah ideal Ideal limit points Borel complexity Ideal cluster points primary
ISSN:	0166-8641
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