Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What does the degree symbol in "Let $(K_n)$ be a sequence of compact subsets such that $K_n \subset K_{n+1}^{\circ}$ mean?

share|cite|improve this question
Almost certainly, "interior". – Arturo Magidin May 6 '12 at 23:40
The interior of the set. – David Mitra May 6 '12 at 23:41
@ArturoMagidin You or David should post this as an answer so that the asker can accept it. – Alex Becker May 7 '12 at 0:20
up vote 4 down vote accepted

In this context, it almost certainly means the interior of the set.

share|cite|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.