Timeline for On a generalization of the Borsuk-Ulam theorem / Tucker's lemma for a map from simplex to its boundary
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Jul 28, 2020 at 2:42 | history | edited | Richard Stanley | CC BY-SA 4.0 |
corrected misspelling in title
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| Jul 27, 2020 at 22:46 | comment | added | Achim Krause | @Wlod AA, I'm pretty sure that way to use edits is against the rules here. If you have something to say, try comments or answers... | |
| Jul 27, 2020 at 22:42 | history | edited | Wlod AA | CC BY-SA 4.0 |
Right, it's true.
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| Jul 27, 2020 at 22:32 | history | edited | Wlod AA | CC BY-SA 4.0 |
It's a shame to misspell Professor Karol Borsuk's name
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| Jul 27, 2020 at 21:25 | review | Close votes | |||
| Aug 12, 2020 at 2:39 | |||||
| Jul 27, 2020 at 21:05 | comment | added | Moritz Firsching | Does this answer your question? Map from simplex to itself that preserves sub-simplices | |
| Jul 27, 2020 at 20:39 | comment | added | Pietro Majer | If $f:\Delta_n\to \Delta_n$ maps every face $F$ to itself, one can consider the topological degree of $f_{|\partial F}:\partial F\to\partial F$ and prove by induction on dim(F) that it is $1$. So $f(F)=F$ for all faces, and in particular $f(\Delta_n)=\Delta_n$. | |
| Jul 27, 2020 at 20:07 | review | First posts | |||
| Jul 27, 2020 at 20:08 | |||||
| Jul 27, 2020 at 19:56 | history | asked | jasonbrady123 | CC BY-SA 4.0 |