New bounds on the cardinality of n-Hausdorff and n-Urysohn spaces

被引：0

作者：

Bonanzinga, Maddalena ^{[1
]}

Carlson, Nathan ^{[2
]}

Giacopello, Davide ^{[1
]}

机构：

[1] Univ Messina, MIFT Dept, Messina, Italy

[2] Calif Lutheran Univ, Dept Math, Thousand Oaks, CA USA

来源：

REVISTA DE LA REAL ACADEMIA DE CIENCIAS EXACTAS FISICAS Y NATURALES SERIE A-MATEMATICAS | 2024年 / 118卷 / 04期

关键词：

n-Hausdorff spaces; n-Urysohn spaces; n-H-closed space; Pseudocharacter; TIGHTNESS; NUMBER;

D O I：

10.1007/s13398-024-01660-6

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

Two new cardinal functions defined in the class of n-Hausdorff and n-Urysohn spaces that extend pseudocharacter and closed pseudocharacter respectively are introduced. Through these new functions bounds on the cardinality of n-Urysohn spaces that represent variations of known results are given. Also properties of n-Urysohn n-H-closed spaces are proved.

引用

页数：13

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