Automorphism Groups and Chern Bounds of Fibrations

Christopher E Creighton, Purdue University

Abstract

In this thesis, I study two problems. First, I generalize a result by H-Y Chen [1] to show that if X is a smooth variety of general type and irregularity q ≥ 1 that embeds into its Albanese variety as a smooth variety Y of general type with codimension one or two, then :Aut(X): ≤ :Aut(Fmin)::Aut(Y ): where Fmin is the minimal model of a general fiber. Then I describe a special type of fibration called a K-Fibration as a generalization to Kodaira Fibrations where we can compute its Chern numbers in dimensions 2 and 3. K-Fibrations act as an initial step in constructing examples of varieties that satisfy the generalization with the goal of computing their automorphism group explicitly.

Degree

Ph.D.

Advisors

Arapura, Purdue University.

Subject Area

Civil engineering

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