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SUMMARY:Dhruv Ranganathan (U. Cambridge)
DTSTART:20210618T140000Z
DTEND:20210618T150000Z
DTSTAMP:20260423T021052Z
UID:LAGARTOS/25
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LAGARTOS/25/
 ">Piecewise polynomials and the moduli space of curves</a>\nby Dhruv Ranga
 nathan (U. Cambridge) as part of (LAGARTOS) Latin American Real and Tropic
 al Geometry Seminar\n\n\nAbstract\nTropical geometry selects natural “pr
 incipal contributions” in an intersection of two varieties inside a thir
 d\, provided the three objects are equipped with a tropicalization (also k
 nown as a logarithmic structure). When one is working inside the moduli sp
 ace of curves\, these contributions are geometrically meaningful. I’ll t
 ry to explain both why they are interesting (via joint work with Renzo Cav
 alieri and Hannah Markwig) and how to understand them conceptually (via jo
 int work with Sam Molcho). The main protagonist in the story is the ring o
 f piecewise polynomial functions on the tropicalization of the moduli spac
 e of curves.\n
LOCATION:https://researchseminars.org/talk/LAGARTOS/25/
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