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?
What does the degree symbol in $K_n \subset K_{n+1}^{\circ}$ mean?
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$\begingroup$
notation
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1@ArturoMagidin You or David should post this as an answer so that the asker can accept it. – 2012-05-07
1 Answers
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In this context, it almost certainly means the interior of the set.