Timeline for Isogenies in multidimensional formal groups
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| May 26, 2014 at 21:55 | comment | added | Tyler Lawson | Example (at $p=2$): Take the self-map of $\widehat{\Bbb G}_m \times \widehat{\Bbb G}_m$ given by multiplication by $2$ on the first factor and the identity on the second factor. Then $h=0$, and the matrix $C(t)$ is rank one, but the kernel is $\mu_2 \times \{1\}$. | |
| May 26, 2014 at 19:25 | history | edited | KConrad | CC BY-SA 3.0 |
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| Aug 14, 2013 at 7:50 | comment | added | Octobris | Take a look at M. Hazewinkel's Formal Groups and Applications. I think you'll find a proof or (at least) an idea of how you can prove the theorem. | |
| Aug 14, 2013 at 5:26 | review | First posts | |||
| Aug 14, 2013 at 6:32 | |||||
| Aug 14, 2013 at 5:07 | history | asked | George | CC BY-SA 3.0 |