Session 30. Real Algebraic Geometry, applications and related topics

Constructing real algebraic curves by using tropical geometry

Johannes Rau, Universität des Saarlandes, Germany
One of the origins of tropical geometry is Viro's combinatorial patchworking techniques, a powerful tool to construct real algebraic curves in the plane with specified topological properties (number and arrangement of ovals). In my talk, I will try to give an overview on the generalizations of this technique provided by tropical geometry and discuss two applications: The topological classification of real rational nodal quintics in the plane (joint work with Itenberg and Mikhalkin) and the computation of *real* double Hurwitz numbers (joint work with Markwig). [No prior knowledge of tropical geometry or Viro's patchworking will be required.]
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