 | Seminario Matematico e Fisico di Milano |
| BERND STURMFELS
University of California Berkeley
TROPICALIZATION OF CLASSICAL MODULI SPACES
Monday, June 17 2013, at 17:00
Università degli Studi di Milano, Dipartimento di Matematica, Via Saldini |
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Abstract
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Algebraic geometry is the study of solutions sets to polynomial equations. Solutions that depend on an infinitesimal parameter are studied combinatorially by tropical geometry.
Tropicalization works especially well for varieties that are parametrized by monomials in linear forms. Many classical moduli spaces (for curves of low genus and few points in the plane) admit such a representation, and we here explore their tropical geometry.
Examples to be discussed include the Segre cubic, the Igusa quartic, the Burkhardt quartic, and moduli of marked del Pezzo surfaces.
Matroids, hyperplane arrangements, and Weyl groups play a prominent role. Our favorites are E6, E7 and G2.
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