Theta surfaces

Abstract: A theta surface in affine 3-space is the zero set of a Riemann theta function in genus 3. This includes surfaces arising from special plane quartics that are singular or reducible. Lie and Poincaré showed that theta surfaces are precisely the surfaces of double translation, i.e. obtained as the Minkowski sum of two space curves in two different ways. These curves are parametrized by abelian integrals, so they are usually not algebraic. We present a new view on this classical topic through the lens of computation. We discuss practical tools for passing between quartic curves and their theta surfaces, and we develop the numerical algebraic geometry of degenerations of theta functions. This is joint work with Daniele Agostini, Turku Celik and Julia Struwe.

algebraic geometrycombinatorics

Audience: researchers in the topic

( paper )

(LAGARTOS) Latin American Real and Tropical Geometry Seminar

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