### Crossing the transcendental divide: from translation surfaces to algebraic curves

- Series
- Algebra Seminar
- Time
- Monday, February 27, 2023 - 10:20 for 1.5 hours (actually 80 minutes)
- Location
- Skiles 005
- Speaker
- Yelena Mandelshtam – UC Berkeley – yelena@math.berkeley.edu

A translation surface is obtained by identifying edges of polygons in the plane to create a compact Riemann surface equipped with a nonzero holomorphic one-form. Every Riemann surface can be given as an algebraic curve via its Jacobian variety. We aim to construct explicitly the underlying algebraic curves from their translation surfaces, given as polygons in the plane. The key tools in our approach are discrete Riemann surfaces, which allow us to approximate the Riemann matrices, and then, via theta functions, the equations of the curves. In this talk, I will present our algorithm and numerical experiments. From the newly found Riemann matrices and equations of curves, we can then make several conjectures about the curves underlying the Jenkins-Strebel representatives, a family of examples that until now, lived squarely on the analytic side of the transcendental divide between Riemann surfaces and algebraic curves.