Timeline for Proofs without words
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 23, 2020 at 8:55 | history | edited | Martin Sleziak | CC BY-SA 4.0 |
http -> https (the question was bumped anyway)
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| Jun 17, 2014 at 2:45 | history | edited | senshin | CC BY-SA 3.0 |
rehost images to imgur to prevent linkrot
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| Mar 18, 2014 at 22:15 | comment | added | Gerry Myerson | The "more general picture" seems to be broken. | |
| Nov 11, 2013 at 11:24 | history | edited | Ronnie Brown | CC BY-SA 3.0 |
added more about how the interchange law gives a crossed module from a double groupoid.
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| Dec 14, 2009 at 23:50 | comment | added | Kevin H. Lin | There are lots of places on the web where this is explained nicely: youtube.com/watch?v=Rjdo-RWQVIY , math.ucr.edu/home/baez/week258.html , ncatlab.org/nlab/show/Eckmann-Hilton+argument , etc.... | |
| Dec 14, 2009 at 20:53 | comment | added | Harrison Brown | I've heard that term, but I've never quite understood how the diagram is supposed to prove the more general abstract nonsense theorem. But if you can explain it, that's what community wiki's for! :D | |
| Dec 14, 2009 at 20:46 | comment | added | Kevin H. Lin | This is sometimes called the Eckmann-Hilton argument: en.wikipedia.org/wiki/Eckmann%E2%80%93Hilton_argument | |
| Dec 14, 2009 at 18:57 | history | edited | Harrison Brown | CC BY-SA 2.5 |
For some reason the first image was resized and ended up tiny...
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| Dec 14, 2009 at 18:27 | comment | added | Dan Piponi | Page 340 of Hatcher's book: math.cornell.edu/~hatcher/AT/AT.pdf | |
| Dec 14, 2009 at 16:08 | history | answered | Harrison Brown | CC BY-SA 2.5 |