Mathematics – Algebraic Geometry
Scientific paper
2008-02-07
Mathematics
Algebraic Geometry
25 pages; this replaces the older preprint math.AG/0306103 and roughly half of the content is new; prepared for the Proceeding
Scientific paper
We describe the relationship between the notions of $M$-regular sheaf and $GV$-sheaf in the case of abelian varieties. The former is a natural strengthening of the latter, and we provide an algebraic criterion characterizing it among the larger class. Based on this we deduce new basic properties of both $M$-regular and $GV$-sheaves. In the second part we give a number of applications of generation criteria for $M$-regular sheaves to the study of Seshadri constants, Picard bundles, pluricanonical maps on irregular varieties, and semihomogeneous vector bundles. This second part of the paper is based on our earlier preprint math.AG/0306103, with some improved statements and shortened arguments.
Pareschi Giuseppe
Popa Mihnea
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