Timeline for Nonprojective Surface
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Sep 1 at 15:07 | comment | added | okabe rintarou | I am trying this exercise 12 years later, and my guess is that the image of 1-cocycle is the alternating sum of each component subtracted by one (as the map in III.Ex.4.6 suggests). Then if the isomorphism between the canonical sheaf and $\mathcal{O}(-3)$ doesn't change the difference of degrees between $x_0, x_1, x_2$, it should map to only symmetric (on degrees) 1-cocycle in Čech cohomology group with usual representation, which is nonzero. | |
| Apr 21, 2012 at 0:57 | comment | added | Igor Rivin | I cleaned up formatting a bit: tips: a. Do NOT use $$ b. DO use backquotes. | |
| Apr 21, 2012 at 0:56 | history | edited | Igor Rivin | CC BY-SA 3.0 |
fixed formatting.
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| Apr 20, 2012 at 23:58 | history | edited | Marc | CC BY-SA 3.0 |
edited body
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| Apr 20, 2012 at 23:55 | comment | added | Marc | I don't undertand why it reads so bad. I have compiled this with a tex editor and there are no errors. | |
| Apr 20, 2012 at 23:52 | history | answered | Marc | CC BY-SA 3.0 |