Questions about radially open sets topology.
44704
familly of Radially open sets in $\mathbb{R}^2$
17544
another topology multiple choice
136106
Is every open subset of $ \mathbb{R} $ uncountable?
2575
Showing that $\mathbb{R}$ is connected
60692
Is this map to a finite dimensional topological vector space an open map?
127900
Interior of closure of open set in topological space
2198
Maps from subsets of $\mathbb{R}^2$ that are either open/closed/continuous
110957
No non-trivial clopen sets in $\mathbb{R}$? How to give a direct proof?
122352
Topologies in a Riemannian Manifold
15480
Open set in a metric space is union of closed sets
147961
Characterizing simply connected spaces
94825
Open set as a finite union of closed sets
51871
Characterization of Topology
6118
Homeomorphism of the real line-Topology
47251
Non-compactness of $\mathbb{R}$ with the cocountable topology
41047
Subspace Topology of a subset
126463
Can open sets and closed sets of $\mathbb{R}^n$ be homeomorphic?