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This tag is used if a reference is needed in a paper or textbook on a specific result.

8 votes
1 answer
279 views

Non-compact three-manifolds with the same proper homotopy type are homeomorphic?

I am looking for some literature with some (counter) examples of the following fact (though I don't know if the fact is true or not): Let $M, M'$ be two non-compact connected $3$-manifolds with the s …
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7 votes
1 answer
265 views

Stallings' binding tie

I came to know that the statement below could be proved using Stallings' binding tie argument, though I have no reference article proving the statement by the binding tie argument. Can anyone help me …
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5 votes
0 answers
130 views

Earliest known proof of "Any degree one self-map of an orientable connected finite-type non-...

I attended a talk where the speaker said the following is due to Nielsen. I searched here and there but couldn't find the corresponding paper, if any. So, what is the earliest known proof of the follo …
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3 votes
1 answer
230 views

Example of a non $\pi_1$-injective, degree one, self-map of a three-manifold

All manifolds will be assumed to be closed, oriented, and connected. Let $f\colon M\to M$ be a map of degree $\pm 1$. It is not hard to show that $\pi_1(f)$ is surjective. What is an example of a non …
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3 votes
1 answer
234 views

Classification of degree one map between two closed orientable surfaces without using induct...

A theorem of Edmonds (see Theorem 3.1. of "Deformation of Maps to Branched Coverings in Dimension Two") says that Theorem 1: A degree-one map between closed orientable surfaces is homotopic to a pinch …
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