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Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.

4 votes
0 answers
428 views

On some characteristics of continuous maps $S^n \to \mathbb{R}^n$

I've asked this question about two month ago in math exchange but there were no answer to it. Any information or paper relating to this question is appreciated. By the Borsuk-Ulam theorem we know tha …
MasM's user avatar
  • 289
5 votes
3 answers
471 views

Is there a dense subset on closed Jordan curve $C$ which its points make intersections under...

Is it true that for any given closed Jordan curve of $C \subset \mathbb{R}^2$ there is a dense subset $A$ such that for every point $p\in A$ we have the following property: If we rotate $C$ around $p …
MasM's user avatar
  • 289
1 vote
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Is there a dense subset on closed Jordan curve $C$ which its points make intersections under...

Thanks for the efforts have done on this problem specially by @erz ,but It seems that Mark J.Nielsen have solved this problem here (that I have found it recently), while he was proving this theorem a …