Is there some accepted notation for a set that is compact?
E.g. I am currently writing "... [blah] is true if for every compact set $A \subset \mathbb{R}^n$ and ...".
I could simplify my writing if there was some notation that meant the set $A$ is compact.
Thank you,
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$\begingroup$$K$ is often used for compact sets, but (to my knowledge) there is no notation that definitively designates a set as compact. If you just said "for every $K \subseteq \mathbb{R}^n...$ the reader could not infer that $K$ is compact.
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