Timeline for Pointed Hurewicz model structure
Current License: CC BY-SA 2.5
6 events
| when toggle format | what | by | license | comment | |
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| Dec 3, 2010 at 16:44 | history | edited | Dmitri Pavlov | CC BY-SA 2.5 |
deleted 12 characters in body
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| Dec 1, 2010 at 6:19 | comment | added | David Roberts♦ | Ah, yes. Silly me. | |
| Dec 1, 2010 at 4:56 | comment | added | Harry Gindi | Yeah, every object is cofibrant, since the closed HEP for the empty set reduces to a diagram for which we can always find a lift (in particular, $\emptyset \times I=\emptyset$, so we can lift the homotopy however we want (contract $X\times I$ back to $X\times 0$ and compose with the section). Similarly, every object is fibrant for the same trivial reason (see Dywer-Spalinski). | |
| Dec 1, 2010 at 4:43 | comment | added | Harry Gindi | @David: Isn't that true in the Strom model structure? | |
| Dec 1, 2010 at 4:27 | comment | added | David Roberts♦ | @Harry - In what model structure on Top are all objects fibrant and cofibrant?? | |
| Dec 1, 2010 at 3:37 | history | answered | Jeff Strom | CC BY-SA 2.5 |