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- W151077141 abstract "To Peter Newstead on his 65th birthday This article is an expository survey of our paper [AK], which provides a new way to think about the construction of moduli spaces of coherent sheaves on projective schemes and the closely related construction of theta functions on such moduli spaces. More precisely, for any projective scheme X , over an algebraically closed field of arbitrary characteristic, we are interested in the moduli spaces (schemes) of semistable coherent sheaves of O X -modules, with a fixed Hilbert polynomial P with respect to a very ample invertible sheaf O (1). Such moduli spaces were first constructed for vector bundles on smooth projective curves by Mumford [Mu] and Seshadri [S1], and this was the context where the key ideas were first developed, namely the notions of stability, semistability and S-equivalence. Thus Mumford showed that there was a quasi-projective variety parametrising isomorphism classes of stable bundles, while Seshadri showed that this is a dense open set in a projective variety parametrising S-equivalence classes of semistable bundles. For modern account of moduli spaces of sheaves and their construction in higher dimensions, see [HL]. Recall that every semistable sheaf has a Jordan-Holder filtration, or S-filtration , with stable factors and two semistable sheaves are S-equivalent if their associated graded sheaves are isomorphic, i.e. their S-filtrations have isomorphic stable factors (counted with multiplicity)." @default.
- W151077141 created "2016-06-24" @default.
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- W151077141 date "2009-05-21" @default.
- W151077141 modified "2023-09-25" @default.
- W151077141 title "Moduli of Sheaves from Moduli of Kronecker Modules" @default.
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- W151077141 doi "https://doi.org/10.1017/cbo9781139107037.008" @default.
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