Schottky Algorithms: Classical meets Tropical
Lynn Chua, Mario Denis Kummer, and Bernd Sturmfels
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Submission date: 27. Jul. 2017
Link to arXiv:See the arXiv entry of this preprint.
We present a new perspective on the Schottky problem that links numerical computing with tropical geometry. The task is to decide whether a symmetric matrix defines a Jacobian, and, if so, to compute the curve and its canonical embedding. We offer solutions and their implementations in genus four, both classically and tropically. The locus of cographic matroids arises from tropicalizing the Schottky-Igusa modular form.