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Results tagged with gn.general-topology
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user 504602
Continuum theory, point-set topology, spaces with algebraic structure, foundations, dimension theory, local and global properties.
3
votes
0
answers
15
views
Does there exist a multi-valued "monotone" and "compact" map from a Boolean algebra to the "...
This is a follow-up to my previous question, which has a negative answer. Here is the most general version that I'm interested:
Does there exist a Boolean algebra $A$, an infinite cardinal $\kappa$, …
- 2,840
0
votes
0
answers
96
views
Does weak $L^2$ approximation implies $L^2$ approximation under a condition similar to conve...
(Cross posted from Math StackExchange: Does weak $L^2$ approximation implies $L^2$ approximation under a condition similar to convexity?)
Assume $(\Omega, \mu)$ is a probability space. Consider a clas …
- 2,840
2
votes
0
answers
56
views
Is a “well-behaved” closed subbasis for the topology generated by a closure operator a close...
Let $\Omega$ be a set, $\mathcal{c}: \mathcal{P}(\Omega) \rightarrow \mathcal{P}(\Omega)$ be a closure operator (i.e., $\mathcal{c}$ satisfies $X \subseteq \mathcal{c}(X)$ and $\mathcal{c}(\mathcal{c} …
- 2,840