Timeline for On Neron-Severi group of normal projective surfaces and blow up
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Sep 23, 2020 at 16:07 | comment | added | Watson | (At least is it true that the Picard number of $\tilde{X}$ is equal to the Picard number of $X$ plus the number of irreducible components of the exceptional divisor $E$ above $p$ ?) | |
| Sep 23, 2020 at 16:03 | comment | added | Watson | Dear F_L, in the example of canonical singularities you gave, we observe that the rank of $\mathrm{Pic}(\widetilde{X}/X)$ coincides with the number of irreducible components of $E$. Is that always the case (regardless the type of singularities of $X$) ? | |
| Nov 5, 2014 at 1:27 | history | edited | Puzzled | CC BY-SA 3.0 |
added 1 character in body
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| May 5, 2014 at 14:08 | vote | accept | user49956 | ||
| Apr 24, 2014 at 17:51 | history | answered | Puzzled | CC BY-SA 3.0 |