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From Riemann surfaces to tropical curves (and back again) – Martin Ulirsch (Goethe University Frankfurt am Main)
The surprisingly deep analogy between compact Riemann surfaces and compact metric graphs lies at the heart of many recent developments in tropical geometry. In this talk I will give a short introduction to tropical geometry via this analogy focusing…
Surfaces with close to irrational Seshadri constants – Sönke Rollenske (Universität Marburg)
Seshadri constants measure local positivity of line bundles and it is an open question if they can be irrational on algebraic surfaces. I will recall this concept and prove that for a general point on a general hypersurface of degree $md$ in…