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Number of components of an open subspace of a compact locally connected space

In a locally connected space $X$, one can show that the connected components of any open subspace $U\subseteq X$ are all open in $X$ (cf. Theorem 25.3 in Munkres' Topology 2e). Therefore, if $X$ is ...
Nick F's user avatar
  • 1,269
4 votes
1 answer
171 views

Metric space that can be written as the finite union of connected subsets but isn't locally connected

I'm looking for an example of a metric space $X$ such that for every $\epsilon > 0$ there exist connected subsets $A_1, \dots A_n$ for some $n \in \mathbb{N}$ such that $X = \cup_{i = 1}^nA_i$ and ...
H4z3's user avatar
  • 891
14 votes
2 answers
235 views

Does locally compact, locally connected, connected metrizable space admit a metric with connected balls?

If $X$ is a locally compact, locally connected, connected metrizable space, does that imply that there must be a metric $d$ on $X$ such that $B(x, r) = \{y\in X : d(x, y) < r\}$ is connected for ...
Jakobian's user avatar
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2 votes
1 answer
100 views

Boundaries in Spaces where Quasicomponents and Components Coincide

Let's call a space $X$ geometric if its components and quasi-components coincide. Let's also define a property called the boundary bumping property: $X$ has the boundary bumping property ("bbp&...
John Samples's user avatar
2 votes
0 answers
57 views

Metric space locally compact but not uniformly locally connected

Definition: A set $M$, also in a metric space, is said to be uniformly locally connected if and only if for every $\varepsilon > 0$ there exists $\delta>0$ such that any pair of points $x, y$ of ...
user123456's user avatar
5 votes
1 answer
98 views

$X$ is locally connected and countably compact

Let $(X,\tau)$ be a topological space $T_3$. Show that the following statements are equivalent: Every open and finite coverage of X has a finite refinement consisting of connected sets. Space X is ...
user1999's user avatar
  • 504
1 vote
1 answer
89 views

Maps between Peano spaces

If $X$ is a Peano spaces with more than one point, and $Y$ is any Peano space, there exists a continuous map $f$ from $X$ onto $Y$. Also, if $a,b$ are distinct points in $X$ and $c,d$ are distinct ...
Ishan Deo's user avatar
  • 3,644
1 vote
1 answer
88 views

Hausdorff and locally compact

Theorem A space $X$ is locally compact and Hausdorff if and only if it is homeomorphic to an open subset of a compact Hausdorff space. Can any one give me hint to prove this result. I want the ...
user avatar
4 votes
1 answer
589 views

Characteristic of a connected, locally compact, Hausdorff space X which is locally connected.

Q. Prove that a connected, locally compact, Hausdorff space X is locally connected if and only if for each compact subset K and each open set U containing K, all but a finite number of components of X-...
Harshit's user avatar
  • 41
1 vote
2 answers
130 views

Set of Points where X Fails to be Locally Connected

I am stuck on a problem! Suppose $X$ is a compact, connected metric space. Let $L(X)$ be the set of points at which $X$ is not locally connected (here, locally connected means the point has a local ...
John Samples's user avatar