Timeline for Fibrations and Cofibrations of spectra are "the same"
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3 events
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| Jan 12, 2016 at 17:58 | comment | added | Bruno Stonek | For the exact connectivity assumptions on this application of the Blakers-Massey theorem, see exercise 6.21 in Arkowitz's homotopy theory book (the dual case is treated). | |
| Jul 29, 2014 at 13:01 | comment | added | Peter May | Just a small quibble. Fibration sequences and cofibration sequences give two structures of triangulated category to the homotopy category of spectra. One is the negative of the other: (f,g,h) is an exact triangle in one if and only if (-f,-g,-h) is an exact triangle in the other. So they are not quite ``the same''. | |
| Jul 29, 2014 at 6:39 | history | answered | Tilman | CC BY-SA 3.0 |