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Cristina Manolache (Imperial)

November 14 @ 2:00 pm - 3:00 pm UTC+0

Enumerative invariants from cuspidal curves.

Enumerative geometry deals with the study of counting problems in geometric spaces. Example questions are:
“How many conics are there through 5 points in the plane?”
“How many lines are there on a cubic surface?”
“How many curves are there on a quintic threefold?”
A powerful tool to study enumerative problems is given by Gromov—Witten invariants. These are supposed to give answers to enumerative problems, but in this talk, I will show that this expectation is wrong. I will instead introduce “reduced” invariants from cuspidal curves, which are more enumerative, and I will discuss a relation between standard and reduced Gromov—Witten invariants.


November 14
2:00 pm - 3:00 pm
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to be announced