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 Date: 2016-04-06 07:35:52String theory Algebraic geometry Homological algebra Mathematical physics Differential geometry Homological mirror symmetry Mirror symmetry Triangulated category Divisor |
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SPHERELIKE DIVISORS ANDREAS HOCHENEGGER Let X be a smooth projective variety of dimension d. An object S in Db (X) is called spherical if (1) Ext• (S, S) = k ⊕ k[−d];