Timeline for Open problems in algebraic topology and homotopy theory
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 10, 2022 at 22:41 | comment | added | The Amplitwist | @Primegaphomologystonermon. I've replaced the broken links with snapshots on the Wayback Machine. An alternative to the second Wayback Machine link might be groupoids.org.uk/nonab-a-t.html. | |
| Aug 10, 2022 at 22:38 | history | edited | The Amplitwist | CC BY-SA 4.0 |
replaced broken links with snapshots on the Wayback Machine
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| Nov 30, 2019 at 0:25 | comment | added | Daniel Donnelly | both links broken :( | |
| Oct 6, 2016 at 20:02 | history | edited | Ronnie Brown | CC BY-SA 3.0 |
updated links and expanded one comment
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| Jul 5, 2013 at 22:02 | comment | added | Ronnie Brown | @Fernando: The problems listed are much more broad, but this question is mentioned on p. 594 (for crossed complexes- over groupoids) as Sauvageot claimed to prove it in his thesis, but there seemed to me to be a gap, concerned with calculating pushouts of crossed modules or complexes when there is a change of fundamental group. | |
| Jul 5, 2013 at 16:04 | comment | added | Fernando Muro | Interesting! I cannot access the document now (I'm in the beach with a not so good mobile). Do you include among your problems the left properness of the model category of crossed modules? I know it's been open for quite a while. I thought it was just a technical point, but it showed up once in my work in connection with a computation in algebraic K-theory. | |
| Jul 5, 2013 at 14:53 | vote | accept | Glen M Wilson | ||
| Jul 5, 2013 at 9:42 | history | edited | Ronnie Brown | CC BY-SA 3.0 |
double word, and further comment
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| Jul 4, 2013 at 20:28 | history | made wiki | Post Made Community Wiki by François G. Dorais | ||
| Jul 4, 2013 at 16:54 | history | answered | Ronnie Brown | CC BY-SA 3.0 |