Surfaces Violating Bogomolov-Miyaoka-Yau in Positive Characteristic

Details Surfaces Violating Bogomolov-Miyaoka-Yau in Positive Characteristic Surfaces Violating Bogomolov-Miyaoka-Yau in Positive Characteristic

2005-11-17

arxiv.org/abs/math/0511455v1

Mathematics

Algebraic Geometry

10 pages

Scientific paper

The Bogomolov-Miyaoka-Yau inequality asserts that the Chern numbers of a surface X of general type in characteristic 0 satisfy the inequality c_1^2 <= 3c_2, a consequence of which is (K_X^2)/chi(O_X) <= 9. This inequality fails in characteristic p, and here we produce infinite families of counterexamples for large p. Our method parallels a construction of Hirzebruch, and relies on a construction of abelian covers due to Catanese and Pardini.

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