Department of

Mathematics

Seminar Calendar
for events the day of Tuesday, April 23, 2019.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
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31


Tuesday, April 23, 2019

1:00 pm in 347 Altgeld Hall,Tuesday, April 23, 2019

To Be Announced

Fritz Gesztesy (Baylor University)

3:00 pm in 243 Altgeld Hall,Tuesday, April 23, 2019

Double ramification cycles for target varieties

Rahul Pandharipande (ETH Zurich)

Abstract: A basic question in the theory of algebraic curves is whether a divisor represents the zeros and poles of a rational function. An explicit solution in terms of periods was given by the work of Abel and Jacobi in the 19th century. In the past few years, a different approach to the question has been pursued: what is the class in the moduli of pointed curves of the locus of such divisors? The answer in Gromov-Witten theory is given by Pixton's formula for the double ramification cycle. I will discuss recent work with F. Janda, A. Pixton, and D. Zvonkine which considers double ramification cycles for target varieties X (where Pixton's original question is viewed as the X=point case). I will also discuss the associated relations studied by Y. Bae.

4:00 pm in 245 Altgeld Hall,Tuesday, April 23, 2019