EVERY NONEMPTY OPEN SET OF THE DIGITAL N-SPACE IS EXPRESSIBLE AS THE UNION OF FINITELY MANY NONEMPTY REGULAR OPEN SETS
キーワード:
digital topology,
digital lines,
Khalimsky lines,
digital planes,
digital n-spaces,
regular open sets,
δ-open sets
2008 年 67 巻 3 号 p. 365-376
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