Maximal slope of tensor product of Hermitian vector bundles
Author:
Huayi Chen
Journal:
J. Algebraic Geom. 18 (2009), 575-603
DOI:
https://doi.org/10.1090/S1056-3911-08-00513-4
Published electronically:
December 3, 2008
MathSciNet review:
2496458
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Abstract |
References |
Additional Information
Abstract: We give an upper bound for the maximal slope of the tensor product of several non-zero Hermitian vector bundles on the spectrum of an algebraic integer ring. By Minkowski’s First Theorem, we need to estimate the Arakelov degree of an arbitrary Hermitian line subbundle $\overline M$ of the tensor product. In the case where the generic fiber of $M$ is semistable in the sense of geometric invariant theory, the estimation is established by constructing, through the classical invariant theory, a special polynomial which does not vanish on the generic fibre of $M$. Otherwise we use an explicit version of a result of Ramanan and Ramanathan to reduce the general case to the former one.
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References
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Additional Information
Huayi Chen
Affiliation:
CMLS, Ecole Polytechnique, Palaiseau 91120, France
Address at time of publication:
Institut de Mathématiques de Jussieu, Université Paris 7 Diderot, 175, rue du Chevaleret 75013 Paris, France
Email:
huayi.chen@polytechnique.org
Received by editor(s):
June 1, 2007
Received by editor(s) in revised form:
January 24, 2008
Published electronically:
December 3, 2008