Timeline for Is the composition of two bundle projections necessarily a bundle projection?
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
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| Sep 7, 2011 at 13:30 | comment | added | Peter Samuelson | In general when you edit a question it's good to make it clear what the edit was so that if people don't change their answers, then readers can still figure out what question the answers address. | |
| Sep 7, 2011 at 9:38 | answer | added | Ben McKay | timeline score: 9 | |
| Sep 7, 2011 at 7:18 | answer | added | Torsten Ekedahl | timeline score: 7 | |
| Sep 7, 2011 at 5:28 | comment | added | Michael | @ Georges: Sorry I was assuming the spaces involved are manifolds. I've had it edited. Please also see my comment to your answer. | |
| Sep 7, 2011 at 5:25 | history | edited | Michael | CC BY-SA 3.0 |
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| Sep 7, 2011 at 5:18 | comment | added | Michael | @ David: That's a question I am also interested in knowing the answer to. | |
| Sep 6, 2011 at 7:36 | comment | added | David Roberts♦ | What about when the spaces involved are locally contractible? | |
| Sep 6, 2011 at 7:35 | comment | added | Georges Elencwajg | @Michael: I am afraid I find your assertion (1) suspicious, since it is not true even if both $f$ and $g$ are covering spaces. Could you please clarify what you mean by supplying an argument or a reference? | |
| Sep 6, 2011 at 0:40 | comment | added | Charlie Frohman | I stand corrected. | |
| Sep 6, 2011 at 0:16 | answer | added | Georges Elencwajg | timeline score: 11 | |
| Sep 6, 2011 at 0:16 | comment | added | Georges Elencwajg | @Charlie: it doesn't follow from the definition nor from anything else because it is false; see my answer. | |
| Sep 5, 2011 at 20:59 | comment | added | Michael | To Charlie: Just to make sure we have the same definition in mind, a bundle projection requires a cover of the base space by locally trivial neighborhoods and a typical fiber. Using this definition, it is not obvious to me why the composition should be a bundle projection. Could you elaborate? | |
| Sep 5, 2011 at 20:11 | history | edited | Michael | CC BY-SA 3.0 |
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| Sep 5, 2011 at 20:08 | comment | added | Charlie Frohman | Yes. It follows directly from the definition. | |
| Sep 5, 2011 at 20:02 | history | asked | Michael | CC BY-SA 3.0 |