regular closed

adjective

Being the closure of its interior.

“The set {0,1,2} is closed, but is not regular closed, because its interior is Ø, so the closure of its interior is Ø.”

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Meanings

adjectiveregular closed (not comparable)
  1. not comparableraremathematicsBeing the closure of its interior.

    The set {0,1,2} is closed, but is not regular closed, because its interior is Ø, so the closure of its interior is Ø.

Origin

Apparently a backformation from regular closed set.

Full word history & related roots →
Cite this entry
APA

regular closed. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/regular%20closed

MLA

“regular closed.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/regular%20closed. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “regular closed,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/regular%20closed.

Source: regular closed on Wiktionary, CC BY-SA 4.0.