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On spares sets and density points defined by families of sequences
by Tomasz Filipczak  

Vol. 3 No. 2 (2008) P.339~P.346

ABSTRACT

In the paper a condition equivalent to sparseness of a set is formulated. This condition is a base for a definition of a density point with respect to a family of sequences ($C$-density). It is shown that $C$-density is a generalization of a density with respect to one sequence ($\langle a \rangle$-density).


KEYWORDS
Sparse sets, density points

MATHEMATICAL SUBJECT CLASSIFICATION 2010
Primary: 28A99

MILESTONES

Received: 2006-10-29
Revised : 2007-03-06
Accepted:


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