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On the determinant bundles of abelian schemes

Abstract:
Let π : A → S be an abelian scheme over a scheme S which is quasi-projective over an affine noetherian scheme and let L be a symmetric, rigidified, relatively ample line bundle on A. We show that there is an isomorphism det(π∗L) ⊗24 (π∗ω∨A)⊗12d of line bundles on S, where d is the rank of the (locally free) sheaf π∗L. We also show that the numbers 24 and 12d are sharp in the following sense: if N > 1 is a common divisor of 12 and 24, then there are data as above such that det(π∗L) ⊗(24/N) (π∗ω∨A)⊗(12d/N).
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1112/S0010437X07003235

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Mathematical Institute
Role:
Author


Publisher:
Foundation Compositio Mathematica
Journal:
Compositio Mathematica More from this journal
Volume:
144
Issue:
02
Pages:
495-502
Publication date:
2008-03-14
Acceptance date:
2007-05-22
DOI:
EISSN:
1570-5846
ISSN:
0010-437X


Keywords:
Pubs id:
pubs:745044
UUID:
uuid:e8d70611-14cd-4981-ab53-e1842165aa5a
Local pid:
pubs:745044
Source identifiers:
745044
Deposit date:
2018-05-05

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