Timeline for Homotopy pullbacks and homotopy pushouts
Current License: CC BY-SA 2.5
6 events
| when toggle format | what | by | license | comment | |
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| Dec 13, 2009 at 0:20 | comment | added | Reid Barton | Oops, that last sentence above is certainly false. Exercise: fix it! | |
| Dec 12, 2009 at 16:59 | comment | added | Reid Barton | Usually, it isn't one: it's the "homotopy orbits" which is the homotopy colimit over a diagram with one object with automorphism group G. When G = Z, it happens to be the homotopy pushout of the diagram X <- X -> X where the left map is the identity and the right map is the action of a generator of Z. | |
| Dec 12, 2009 at 16:44 | comment | added | Alicia Garcia-Raboso | OK, I see the picture, but what homotopy pullback/pushout is that? | |
| Dec 12, 2009 at 16:40 | history | edited | Mariano Suárez-Álvarez | CC BY-SA 2.5 |
added 569 characters in body; added 6 characters in body; added 1 characters in body; added 51 characters in body
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| Dec 12, 2009 at 16:22 | comment | added | Alicia Garcia-Raboso | Yet that does not quite give me an intuition on what they are, only on why they are necessary in some contexts. | |
| Dec 12, 2009 at 16:20 | history | answered | Mariano Suárez-Álvarez | CC BY-SA 2.5 |