This book is intended to serve as an introduction to the theory of semistable sheaves and at the same time to provide a survey of recent research results on the geometry of moduli spaces.The first part introduces the basic concepts in the Hilbert polynomial, slope, stability, Harder-Narasimhan filtration, Grothendieck's Quot-scheme. It presents detailed proofs of the Grauert-Mülich Theorem, the Bogomolov Inequality, the semistability of tensor products, and the boundedness of the family of semistable sheaves. It also gives a self-contained account of the construction of moduli spaces of semistable sheaves on a projective variety à la Gieseker, Maruyama, and Simpson.The second part presents some of the recent results of the geometry of moduli spaces of sheaves on an algebraic surface, following work of Mukai, O'Grady, Gieseker, Li and many others. In particular, moduli spaces of sheaves on K3 surfaces and determinant line bundles on the moduli spaces are treated in some detail. Other topics include the Serre correspondence, restriction of stable bundles to curves, symplectic structures, irreducibility and Kodaira-dimension of moduli spaces.
Cambridge Mathematical Library Serie
Questa stimata collezione fa rivivere testi matematici fondamentali, attraendo sia studenti aspiranti che professionisti esperti. Presenta una selezione curata di classici testi didattici e monografie, molti dei quali detengono un significativo valore storico. La serie promuove un ritorno ad approcci matematici più concreti e meno astratti che stanno riguadagnando importanza. È una risorsa essenziale per matematici, biblioteche e chiunque sia interessato agli aspetti storici e pratici della disciplina.



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