Is Path Connectedness Enough for Local Path Connectedness?

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In summary, local path connectedness is a topological property where every point has a path connected neighborhood. It differs from path connectedness, which requires the entire space to be connected by a path. It is important in topology for classifying and distinguishing different spaces, and has applications in analysis and geometry. A space can be locally path connected but not path connected, and to prove local path connectedness, one can show that every point has a path connected neighborhood or use the conditions of being locally connected and semi-locally simply connected.
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jojo12345
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Is there a space that is path connected but NOT locally path connected? I suspect that there must be some example because the theorem on the classification of covering spaces only applies to spaces that are, amongst other things, path connected and locally path connected.
 
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Thanks a lot!
 

FAQ: Is Path Connectedness Enough for Local Path Connectedness?

What is local path connectedness?

Local path connectedness is a topological property of a space where every point has a neighborhood that is path connected, meaning that there is a path connecting any two points within that neighborhood.

How is local path connectedness different from path connectedness?

Path connectedness refers to the entire space being connected by a path, while local path connectedness only requires each point to have a path connected neighborhood. This means that a space can be path connected without being locally path connected.

Why is local path connectedness an important concept in topology?

Local path connectedness is important because it helps to classify and distinguish different types of topological spaces. It also has applications in mathematical analysis and differential geometry.

Can a space be locally path connected but not path connected?

Yes, a space can be locally path connected but not path connected. For example, the topologist's sine curve is locally path connected, but not path connected.

How can I prove that a space is locally path connected?

To prove that a space is locally path connected, you can use the definition of local path connectedness and show that every point in the space has a path connected neighborhood. Alternatively, you can use the fact that a space is locally path connected if and only if it is locally connected and semi-locally simply connected.

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