What does the degree symbol in $K_n \subset K_{n+1}^{\circ}$ mean?

Question

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?

@ArturoMagidin You or David should post this as an answer so that the asker can accept it. — Alex Becker, May 07 '12 at 00:20

score 4 · Accepted Answer · edited May 07 '12 at 01:07

4

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

edited May 07 '12 at 01:07

lhf

answered May 07 '12 at 01:05

Arturo Magidin

1 Answers1