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Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics / Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics, (P)1226-0657; (E)2287-6081
1999, v.6 no.1, pp.13-16
Goo, Yoon-Hoe
Ry, Dae-Hee
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Abstract

We introduce the notion of the <TEX>$\omega$</TEX>-derived set and <TEX>$\omega$</TEX>-dense, and investigate some of their properties.

keywords
<tex> $\omega$</tex>-derived set, <tex> $\omega$</tex>-dense

Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics