Is the following space connected
37589
Connectedness of points with both rational or irrational coordinates in the plane?
85332
Is $\mathbb{R}^4$ minus a line simply connected?
50677
Is this metric space incomplete?
151923
$F$ closed and connected then...
16517
Arcwise connected part of $\mathbb R^2$
15865
Show that $X = \{ (x,y) \in\mathbb{R}^2\mid x \in \mathbb{Q}\text{ or }y \in \mathbb{Q}\}$ is path connected.
151051
connectedness of uniform topology
115695
If $X$ is a connected subset of a connected space $M$ then the complement of a component of $M \setminus X$ is connected
27253
Path connectedness of the set $\{(x,y):(x+1)^{2}+y^{2}\leq 1\}\cup\{(x,y):y=x\sin(\frac{1}{x}),x>0\}$
37840
Does the Levi-Civita connection determine the metric?
73690
If $\mathbb R^3\setminus V$ connected where $V$ is the subspace generated by $\{(1,1,1),(0,1,1)\} $
18572
Union of a family of connected pairwise not disjoint subspaces is connected
109046
Is the complement of an open ball in a Banach space connected?
17470
Does path-connected imply simple path-connected?
94735
Base and Spans, linear space
147961
Characterizing simply connected spaces
59289
Nested Sequence of Topological Space and the Coherent Topology; Munkres Topology 35.9