Timeline for Weak Fano and Log fano varieties
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Apr 9, 2014 at 18:34 | history | edited | Karl Schwede | CC BY-SA 3.0 |
typos
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| Apr 9, 2014 at 13:31 | comment | added | user49214 | Thank you very much. Yes, you are right, $e>2$ works. Here is the computation: the anticanonical divisor is $-K_{X_e} = -2C_0-(2+e)F$, where $C_0$ is the section and $F$ is the fiber. Therefore $-K_{X_e}\cdot C_0 = 2C_0^2+2+e = -e+2$, and $-K_{X_e}$ is not nef for $e>2$. | |
| Apr 9, 2014 at 13:20 | history | edited | Karl Schwede | CC BY-SA 3.0 |
added 43 characters in body
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| Apr 9, 2014 at 1:11 | history | answered | Karl Schwede | CC BY-SA 3.0 |