Timeline for Using principal polarisation to "cancel" Jacobian summands in isomorphism
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 12, 2020 at 16:49 | comment | added | mathphys | Yes I see, thanks very much! | |
| Oct 12, 2020 at 16:42 | comment | added | abx | Corollary 3.23 in Clemens-Griffiths tells you that there is a unique decomposition of a p.p.a.v as a product of irreducible ones. This implies immediately that $J(Y)$ is a product of some of the $J(C_i)$. Actually you don't need the polarization to be principal — see O. Debarre, C. R. Acad. Sci. Paris 323 (1996), 631-635. | |
| Oct 12, 2020 at 16:34 | history | asked | mathphys | CC BY-SA 4.0 |