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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Partially positive line bundles

## Partially positive line bundlesAdd to your list(s) Download to your calendar using vCal - Totaro, B (DPMMS, Cambridge)
- Thursday 12 May 2011, 10:30-11:30
- Seminar Room 1, Newton Institute.
If you have a question about this talk, please contact Mustapha Amrani. Moduli Spaces Define a line bundle L on a projective variety to be q-ample, for a natural number q, if tensoring with high powers of L kills coherent sheaf cohomology above dimension q. Thus 0-ampleness is the usual notion of ampleness. Intuitively, a line bundle is q-ample if it is positive “in all but at most q directions”. We prove some of the basic properties of q-ample line bundles. Related ideas have been used by Ottem to define what an “ample subvariety” of any codimension should mean. This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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