Timeline for Topological/numerical constraints for the existence of more than one pencil
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Dec 15, 2014 at 23:18 | comment | added | Ashwath Rabindranath | Thank you! Is there a reference about this that you could suggest? | |
| Dec 15, 2014 at 16:56 | comment | added | Donu Arapura | Yes, there is a topological characterization. One can use the so called the 1st characteristic variety (or jump locus) which is the set of rank one local systems with nontrivial $H^1$. This forms a variety and the positive irreducible components through $1$ are in bijection with pencils. | |
| Dec 15, 2014 at 7:31 | history | edited | Ashwath Rabindranath | CC BY-SA 3.0 |
edited title
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| Dec 15, 2014 at 7:22 | history | asked | Ashwath Rabindranath | CC BY-SA 3.0 |