Some new cardinal inequalities involving a cardinal function less than the spread and the density

Shuhao Sun, Koo-Guan Choo

Research output: Contribution to journalArticleResearchpeer-review

Abstract

In this paper, a cardinal function, denoted by sqL(X), which is less than both the spread and the density, is investigated in some details. We prove that, in several known inequalities involving the spread s(X), the spread s(X) can be replaced by sqL(X). A related cardinal function, denoted by qL(X), is also discussed.
Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalCommentationes Mathematicae Universitatis Carolinae
Volume31
Issue number2
Publication statusPublished - 1990
Externally publishedYes

Cite this

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abstract = "In this paper, a cardinal function, denoted by sqL(X), which is less than both the spread and the density, is investigated in some details. We prove that, in several known inequalities involving the spread s(X), the spread s(X) can be replaced by sqL(X). A related cardinal function, denoted by qL(X), is also discussed.",
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Some new cardinal inequalities involving a cardinal function less than the spread and the density. / Sun, Shuhao; Choo, Koo-Guan.

In: Commentationes Mathematicae Universitatis Carolinae, Vol. 31, No. 2, 1990, p. 395-401.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Some new cardinal inequalities involving a cardinal function less than the spread and the density

AU - Sun, Shuhao

AU - Choo, Koo-Guan

PY - 1990

Y1 - 1990

N2 - In this paper, a cardinal function, denoted by sqL(X), which is less than both the spread and the density, is investigated in some details. We prove that, in several known inequalities involving the spread s(X), the spread s(X) can be replaced by sqL(X). A related cardinal function, denoted by qL(X), is also discussed.

AB - In this paper, a cardinal function, denoted by sqL(X), which is less than both the spread and the density, is investigated in some details. We prove that, in several known inequalities involving the spread s(X), the spread s(X) can be replaced by sqL(X). A related cardinal function, denoted by qL(X), is also discussed.

M3 - Article

VL - 31

SP - 395

EP - 401

JO - Commentationes Mathematicae Universitatis Carolinae

JF - Commentationes Mathematicae Universitatis Carolinae

SN - 0010-2628

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