Notation for set of limit points?

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The discussion centers on the notation for the set of limit points of a set, with A' being a commonly used symbol. Participants express familiarity with this notation, although some admit to not initially understanding its meaning. The conversation highlights the importance of clear mathematical notation in conveying concepts effectively. Overall, A' is recognized as a standard representation for limit points in mathematical literature. Understanding this notation can enhance clarity in discussions about limit points.
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Is there a common notation for the set of limit points of a set?
 
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Apparently A^\prime is often used.
 
Oh, lucky break, I had encountered that before but couldn't guess what it meant.

Thanks.
 

Thread 'About the definition of topological manifold using closed sets'

We all know the definition of n-dimensional topological manifold uses open sets and homeomorphisms onto the image as open set in ##\mathbb R^n##. It should be possible to reformulate the definition of n-dimensional topological manifold using closed sets on the manifold's topology and on ##\mathbb R^n## ? I'm positive for this. Perhaps the definition of smooth manifold would be problematic, though.
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