A note on star-Hurewicz spaces
Author(s) -
Yan-Kui Song,
Rui Li
Publication year - 2013
Publication title -
filomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 34
eISSN - 2406-0933
pISSN - 0354-5180
DOI - 10.2298/fil1306091s
Subject(s) - star (game theory) , subspace topology , tychonoff space , mathematics , regular space , space (punctuation) , pure mathematics , mathematical analysis , topological space , computer science , operating system
In this paper, we show the following statements: (1) There exists a Tychonoff pseudocompact, star-Hurewicz space having a regular-closed subspace which is not star-Hurewicz; (2) Assuming ω1 < b, there exists a Tychonoff strongly star-Hurewicz (hence star-Hurewicz) space having a regular-closed Gδ-subspace which is not star-Hurewicz (hence not strongly star-Hurewicz); (3) An open Fσ-subset of a strongly star-Hurewicz space is strongly star-Hurewicz.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom