Generic Vanishing and Minimal Cohomology Classes on Abelian Varieties

نویسندگان

  • GIUSEPPE PARESCHI
  • MIHNEA POPA
چکیده

This paper is concerned with a relationship between the existence of subvarieties of principally polarized abelian varieties (ppav’s) having minimal cohomology class and the (generic) vanishing of certain sheaf cohomology, based on the Generic Vanishing criterion studied in [PP3]. This is in analogy with the well-known equivalence between a subvariety in projective space being of minimal degree and its ideal sheaf being Castelnuovo-Mumford 2-regular (cf. e.g. [EG]). We state the following conjecture.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Generic Vanishing and Minimal Cohomology Classes on Abelian Fivefolds

We classify GV -subschemes of five-dimensional ppavs, proving the main conjecture in [PP08b] in this case. This result is implied by a more general statement about subvarieties of minimal cohomology class whose sum is a theta divisor.

متن کامل

Gaussian Maps and Generic Vanishing I: Subvarieties of Abelian Varieties

We work with irreducible projective varieties on an algebraically closed field of any characteristic, henceforth called varieties. The contents of this paper are: (1) a general criterion expressing the vanishing of the higher cohomology of a line bundle on a Cohen-Macaulay variety in terms of a certain first-order conditions on hyperplane sections. Such conditions involve gaussian maps and the ...

متن کامل

Whitehead’s Lemmas and Galois Cohomology of Abelian Varieties

Whitehead’s lemmas for Lie algebra cohomology translate into vanishing theorems for H and H in Galois cohomology. Via inflation-restriction, the H vanishing theorem leads to a simple formula for H(K, T`), where T` is the `-adic Tate module of an abelian variety over a number field K. We apply this formula to the “support problem” for abelian varieties. Under a suitable semisimplicity hypothesis...

متن کامل

Correspondences with Split Polynomial Equations

We introduce endomorphisms of special jacobians and show that they satisfy polynomial equations with all integer roots which we compute. The eigen-abelian varieties for these endomorphisms are generalizations of Prym-Tyurin varieties and naturally contain special curves representing cohomology classes which are not expected to be represented by curves in generic abelian varieties.

متن کامل

A Partial Horn Recursion in the Cohomology of Flag Varieties

Horn recursion is a term used to describe when non-vanishing products of Schubert classes in the cohomology of complex flag varieties are characterized by inequalities parameterized by similar non-vanishing products in the cohomology of “smaller” flag varieties. We consider the type A partial flag variety and find that its cohomology exhibits a Horn recursion on a certain deformation of the cup...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006