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A possible typo in a proof about closure in textbook Introduction to Set Theory 3rd by Hrbacek and Jech - Mathematics Stack Exchange
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real analysis - Show that the closure of $A$ is the intersection of all closed sets containing $A$, topology proof needed - Mathematics Stack Exchange
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Closure of A is Smallest Closed Superset of A | Closure of A is equal to A iff A is Closed - YouTube
![Dave Richeson på Twitter: "Today in topology: relationships between open sets, closed sets, interior points, limit points, interior, and closure. Here's a nice exercise that requires understanding the various definitions. https://t.co/HHA7cV54KA" / Dave Richeson på Twitter: "Today in topology: relationships between open sets, closed sets, interior points, limit points, interior, and closure. Here's a nice exercise that requires understanding the various definitions. https://t.co/HHA7cV54KA" /](https://pbs.twimg.com/media/EQbjc9nWoAILdBg.jpg)
Dave Richeson på Twitter: "Today in topology: relationships between open sets, closed sets, interior points, limit points, interior, and closure. Here's a nice exercise that requires understanding the various definitions. https://t.co/HHA7cV54KA" /
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