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Tropical Intersection Theory on Moduli Stack of Curve Coverings


Type

Thesis

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Authors

Jin, Zhi 

Abstract

We construct the moduli cone stack \mathfracMηtrop of tropical '{e}tale covers (i.e., coverings of twisted tropical curves). We define the tropical intersection theory on \mathfracMηtrop and show that the tropical intersection theory agrees with the intersection theory on the moduli stack \mathfracM¯η of '{e}tale covers (i.e., coverings of twisted algebraic curves). We apply the tropical intersection theory on \mathfracMηtrop to calculate the intersection numbers of Psi-classes on the moduli space \mathfracM¯g,n of n-marked genus g curves. We also define the moduli stack \mathfracMηlog of logarithmic '{e}tale covers and describe the tropicalization map from \mathfracMηlog to the Artin fan of \mathfracMηtrop.

Description

Date

2018-09-18

Advisors

Gross, Mark

Keywords

Intersection theory, tropical curve, moduli stack

Qualification

Doctor of Philosophy (PhD)

Awarding Institution

University of Cambridge