Timeline for Integral cohomology (stable) operations
Current License: CC BY-SA 2.5
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 5, 2013 at 15:09 | vote | accept | Sean Tilson | ||
| Jun 5, 2013 at 15:07 | vote | accept | Sean Tilson | ||
| Jun 5, 2013 at 15:08 | |||||
| Mar 17, 2013 at 10:31 | comment | added | Markus Land | I also believe that it is "well-known" that stable operations of degree $1$ are just given by Ext-groups of the two coefficient groups between which you want to calculate operations. Of course this implies that $H\mathbb{Z}^1H\mathbb{Z} = 0$. | |
| Dec 28, 2010 at 13:54 | history | edited | Tom Goodwillie | CC BY-SA 2.5 |
added 622 characters in body
|
| Dec 28, 2010 at 9:08 | comment | added | Torsten Ekedahl | The composite of reduction mod p and the integral Bockstein is zero by construction as the integral Bockstein is the boundary map coming from the sequence $0\to\mathbb Z\to\mathbb Z\to\mathbb Z/p\to0$. | |
| Dec 28, 2010 at 6:59 | comment | added | Sean Tilson | I do not understand how those groups can be finite for all n larger than 0. It seems that there should be an operation $\beta_p$ for each prime, a composition of the reduction mod p and then the integral bockstein, in $H\mathbb{Z}^1 H\mathbb{Z}$. | |
| Dec 28, 2010 at 4:31 | history | answered | Tom Goodwillie | CC BY-SA 2.5 |