regular open

短语

释义与例句

adj.
  1. 1.

    Being the interior of its closure.

    罕用 数学

    The set (0,1)∪(1,2) is open, but is not regular open, because its closure is [0,2], so the interior of its closure is (0,2).

词源

From regular + open; apparently a backformation from regular open set.

来源：wiktionary