regular open
Being the interior of its closureBeing the interior of its closure.
Meaning
1 senses(not comparable, rare)Being the interior of its closure.
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).
Origin
From regular + open; apparently a backformation from regular open set.From regular + open; apparently a backformation from regular open set.
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Word family
1 related wordsRelatedregular closed