Arithmetic Bogomolov-Gieseker's inequality

Details Arithmetic Bogomolov-Gieseker's inequality Arithmetic Bogomolov-Gieseker's inequality

1993-07-19

arxiv.org/abs/alg-geom/9307004v1

Mathematics

Algebraic Geometry

21 pages, AmSTeX

Scientific paper

Let f : X --> Spec(Z) be an arithmetic variety of dimension d >= 2 and (H, k) an arithmetically ample Hermitian line bundle on X. Let (E, h) be a rank r vector bundle on X. In this paper, we will prove that if E is semistable with respect to H on each connected component of the infinite fiber of X, then { c_2(E, h) - (r-1)/(2r) c_1(E, h)^2 } c_1(H, k)^{d-2} >= 0. Moreover, if the equality of the above inequality holds, then E is projectively flat and h is a weakly Einstein-Hermitian metric.

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