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Complex Ball Quotients and Line Arrangements in the Projective Plane (MN-51)$
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Paula Tretkoff

Print publication date: 2016

Print ISBN-13: 9780691144771

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691144771.001.0001

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Algebraic Surfaces and the Miyaoka-Yau Inequality

Algebraic Surfaces and the Miyaoka-Yau Inequality

Chapter:
(p.65) Chapter Four Algebraic Surfaces and the Miyaoka-Yau Inequality
Source:
Complex Ball Quotients and Line Arrangements in the Projective Plane (MN-51)
Author(s):

Paula Tretkoff

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691144771.003.0005

This chapter discusses complex algebraic surfaces, with particular emphasis on the Miyaoka-Yau inequality and the rough classification of surfaces. Every complex algebraic surface is birationally equivalent to a smooth surface containing no exceptional curves. The latter is known as a minimal surface. Two related birational invariants, the plurigenus and the Kodaira dimension, play an important role in distinguishing between complex surfaces. The chapter first provides an overview of the rough classification of (smooth complex connected compact algebraic) surfaces before presenting two approaches that, in dimension 2, give the Miyaoka-Yau inequality. The first, due to Miyaoka, uses algebraic geometry, whereas the second, due to Aubin and Yau, uses analysis and differential geometry. The chapter also explains why equality in the Miyaoka-Yau inequality characterizes surfaces of general type that are free quotients of the complex 2-ball.

Keywords:   algebraic surface, Miyaoka-Yau inequality, minimal surface, plurigenus, Kodaira dimension, complex surface, algebraic geometry, differential geometry, complex 2-ball

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