<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>INSTITUTE FOR ADVANCED STUDY<o:p></o:p></p><p class=MsoNormal>School of Mathematics<o:p></o:p></p><p class=MsoNormal>Princeton, NJ 08540<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Mathematics Seminars<o:p></o:p></b></p><p class=MsoNormal><b>Week of December 17, 2018<o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>--------------<o:p></o:p></p><p class=MsoNormal><b>Announcements:<o:p></o:p></b></p><p class=MsoNormal>The following seminars have concluded for the Fall 2018 term (effective the week of Dec. 17), and will resume on the dates provided below. Additional information will be sent on a later date that will confirm the dates/times for the Spring 2019 Mathematics Seminars.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='line-height:115%'><b>CSDM</b> – no seminars this week, and will resume January 22.<o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>TML </b>– no seminar this week, and will resume in January. <o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>Members’ Seminar </b>– no seminar this week, and will resume January 28. <o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>PU/IAS Symplectic Dynamics/Geometry Seminar </b>– final talk is Monday, Dec. 17, and will resume in January.<o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>Special Year Seminar-Variational Methods in Geometry</b>—final talk is on Tuesday, Dec. 18 at 1:00pm. There will be no 3:30pm seminar, and will resume January 15.<o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>Informal Group Action Seminar </b>– Seminar has concluded.<o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>Math Conversations</b> – no seminar this week, and will resume in January. <o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>Venkatesh Working Group, Working Seminar in Algebraic Number Theory, Joint IAS/PU Number Theory Seminar </b>– no seminars this week, and will resume January 24.<o:p></o:p></p><p class=MsoNormal style='line-height:115%'><b>Analysis</b> – No seminar this week, and will resume in January. <o:p></o:p></p><p class=MsoNormal>--------------<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Monday, December 17<o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Symplectic Dynamics/Geometry Seminar<o:p></o:p></p><p class=MsoNormal>Topic: Barcodes and $C^0$ symplectic topology<o:p></o:p></p><p class=MsoNormal>Speaker: Sobhan Seyfaddini, ENS Paris<o:p></o:p></p><p class=MsoNormal>Time/Room: 3:30pm - 5:00pm/Simonyi Hall 101<o:p></o:p></p><p class=MsoNormal><span lang=FR>Abstract Link: </span><a href="http://www.math.ias.edu/seminars/abstract?event=137937"><span lang=FR>http://www.math.ias.edu/seminars/abstract?event=137937</span></a><span lang=FR><o:p></o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal><b>Tuesday, December 18<o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Variational Methods in Geometry Seminar<o:p></o:p></p><p class=MsoNormal>Topic: Bounds in Renormalized Volume for Hyperbolic 3-manifolds<o:p></o:p></p><p class=MsoNormal>Speaker: Franco Vargas Pallete, University of California, Berkeley; Member, School of Mathematics<o:p></o:p></p><p class=MsoNormal>Time/Room: 1:00pm - 3:00pm/Simonyi Hall 101<o:p></o:p></p><p class=MsoNormal><span lang=FR>Abstract Link: </span><a href="http://www.math.ias.edu/seminars/abstract?event=140492"><span lang=FR>http://www.math.ias.edu/seminars/abstract?event=140492</span></a><span lang=FR><o:p></o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal>Symplectic Dynamics Working Group<o:p></o:p></p><p class=MsoNormal>Topic: Celestial Mechanics and Holomorphic Curves II<o:p></o:p></p><p class=MsoNormal>Speaker: Umberto Hryniewicz<o:p></o:p></p><p class=MsoNormal>Time/Room: 1:30pm - 3:00pm/Simonyi Hall Classroom 114<o:p></o:p></p><p class=MsoNormal><span lang=FR>Abstract Link: </span><a href="http://www.math.ias.edu/seminars/abstract?event=140630"><span lang=FR>http://www.math.ias.edu/seminars/abstract?event=140630</span></a><span lang=FR><o:p></o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal><span lang=FR><o:p> </o:p></span></p><p class=MsoNormal><b>Friday, December 21<o:p></o:p></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Allen-Cahn/Ginzburg-Landau Reading group<o:p></o:p></p><p class=MsoNormal>Speaker: TBD<o:p></o:p></p><p class=MsoNormal>Time/Room: 10:00am - 12:00pm/Simonyi Hall 101<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1 Barcodes and $C^0$ symplectic topology <br> Sobhan Seyfaddini <br><br><br><o:p></o:p></p><p class=MsoNormal>Hamiltonian homeomorphisms are those homeomorphisms of a symplectic manifold which can be written as uniform limits of Hamiltonian diffeomorphisms. One difficulty in studying Hamiltonian homeomorphisms (particularly in dimensions greater than two) has been that we possess fewer tools for studying them. For example, (filtered) Floer homology, which has been a very effective tool for studying Hamiltonian diffeomorphisms, is not well-defined for homeomorphisms. We will show in this talk that using barcodes and persistence homology one can indirectly define (filtered) Floer homology for Hamiltonian homeomorphisms.<o:p></o:p></p><p class=MsoNormal><a href="http://www.math.ias.edu/seminars/abstract?event=137937">http://www.math.ias.edu/seminars/abstract?event=137937</a><br><br><br><o:p></o:p></p><p class=MsoNormal>2 Bounds in Renormalized Volume for Hyperbolic 3-manifolds <br> Franco Vargas Pallete <br><br><br><o:p></o:p></p><p class=MsoNormal>Renormalized volume (and more generally W-volume) is a geometric quantity found by volume regularization. In this talk I'll describe its properties for hyperbolic 3-manifolds, as well as discuss techniques to prove optimality results.<o:p></o:p></p><p class=MsoNormal><a href="http://www.math.ias.edu/seminars/abstract?event=140492">http://www.math.ias.edu/seminars/abstract?event=140492</a><br><br><br><o:p></o:p></p><p class=MsoNormal>3 Celestial Mechanics and Holomorphic Curves II <br> Umberto Hryniewicz <br><br><br><o:p></o:p></p><p class=MsoNormal>I would like to discuss three topics concerning applications of holomorphic curve methods to the planar circular restricted three-body problem. The first is the existence of direct orbits and a conjecture due to Birkhoff. The second is the use of finite-energy foliations to estimate topological entropy via symbolic dynamics. The third is the existence of forcing phenomena for periodic orbits for energies slightly above the lowest critical value, related to some kind of "local Weinstein conjecture" that can be of independent interest.<o:p></o:p></p><p class=MsoNormal><a href="http://www.math.ias.edu/seminars/abstract?event=140630">http://www.math.ias.edu/seminars/abstract?event=140630</a><o:p></o:p></p></div></body></html>