Difference between revisions of "Analysis Seminar"

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(Xianghong Chen (UW Milwaukee))
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|January 24
 
|January 24
 
| Tamás Darvas (Maryland)  
 
| Tamás Darvas (Maryland)  
|[[#linktoabstract  |   TBA ]]
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|[[#linktoabstract  | Existence of constant scalar curvature Kahler metrics and properness of the K-energy ]]
 
| Viaclovsky
 
| Viaclovsky
 
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We will begin by introducing the free boundary Euler equations which are a system of nonlinear PDEs modeling the motion of fluids, such as waves on the surface of the ocean. We will discuss several works done on this system in recent years, and how they fit into the broader context of the study of nonlinear evolution problems. We will then focus on the question of global regularity for water waves, present some of our main results - obtained in collaboration with Ionescu and Deng-Ionescu-Pausader - and sketch some of the main ideas.
 
We will begin by introducing the free boundary Euler equations which are a system of nonlinear PDEs modeling the motion of fluids, such as waves on the surface of the ocean. We will discuss several works done on this system in recent years, and how they fit into the broader context of the study of nonlinear evolution problems. We will then focus on the question of global regularity for water waves, present some of our main results - obtained in collaboration with Ionescu and Deng-Ionescu-Pausader - and sketch some of the main ideas.
 +
 +
===  Tamás Darvas (Maryland) ===
 +
''Existence of constant scalar curvature Kahler metrics and properness of the K-energy''
 +
 +
Given a compact Kahler manifold $(X,\omega)$, we show that if there exists a constant
 +
scalar curvature Kahler metric  cohomologous to $\omega$ then Mabuchi's K-energy is J-proper in an
 +
appropriate sense, confirming a conjecture of Tian from the nineties. The proof involves a careful
 +
study of weak minimizers of the K-energy, and involves a surprising amount of analysis. This is
 +
joint work with Robert Berman and Chinh H. Lu.
  
 
===  Xianghong Chen (UW Milwaukee) ===
 
===  Xianghong Chen (UW Milwaukee) ===

Revision as of 07:43, 18 January 2017

Analysis Seminar Current Semester

The seminar will meet Tuesdays, 4:00 p.m. in VV B139, unless otherwise indicated.

If you wish to invite a speaker please contact Andreas at seeger(at)math

Previous Analysis seminars

Analysis Seminar Schedule Spring 2017

date speaker title host(s)
January 17, Math Department Colloquium Fabio Pusateri (Princeton) The Water Waves Problem Angenent
January 24 Tamás Darvas (Maryland) Existence of constant scalar curvature Kahler metrics and properness of the K-energy Viaclovsky
Monday, January 30, 3:30, VV901 (PDE Seminar) Serguei Denissov (UW) Title
March 7, Mathematics Department Distinguished Lecture Roger Temam (Indiana) TBA Smith
Wednesday, March 8, Joint Applied Math/PDE/Analysis Seminar Roger Temam (Indiana) TBA Smith
March 14 Xianghong Chen (UW Milwaukee) Restricting the Fourier transform to some oscillating curves Seeger
March 21 SPRING BREAK
March 28 Brian Cook (Fields Institute) TBA Seeger

Abstracts

Fabio Pusateri (Princeton)

The Water Waves problem

We will begin by introducing the free boundary Euler equations which are a system of nonlinear PDEs modeling the motion of fluids, such as waves on the surface of the ocean. We will discuss several works done on this system in recent years, and how they fit into the broader context of the study of nonlinear evolution problems. We will then focus on the question of global regularity for water waves, present some of our main results - obtained in collaboration with Ionescu and Deng-Ionescu-Pausader - and sketch some of the main ideas.

Tamás Darvas (Maryland)

Existence of constant scalar curvature Kahler metrics and properness of the K-energy

Given a compact Kahler manifold $(X,\omega)$, we show that if there exists a constant scalar curvature Kahler metric  cohomologous to $\omega$ then Mabuchi's K-energy is J-proper in an appropriate sense, confirming a conjecture of Tian from the nineties. The proof involves a careful study of weak minimizers of the K-energy, and involves a surprising amount of analysis. This is joint work with Robert Berman and Chinh H. Lu.

Xianghong Chen (UW Milwaukee)

Restricting the Fourier transform to some oscillating curves

I will talk about Fourier restriction to some compact smooth curves. The problem is relatively well understood for curves with nonvanishing torsion due to work of Drury from the 80's, but is less so for curves that contain 'flat' points (i.e. vanishing torsion). Sharp results are known for some monomial-like or finite type curves by work of Bak-Oberlin-Seeger, Dendrinos-Mueller, and Stovall, where a geometric inequality (among others) plays an important role. Such an inequality fails to hold if the torsion demonstrates strong sign-changing behavior, in which case endpoint restriction bounds may fail. In this talk I will present how one could obtain sharp non-endpoint results for certain space curves of this kind. Our approach uses a covering lemma for smooth functions that strengthens a variation bound of Sjolin, who used it to obtain a similar result for plane curves. This is joint work with Dashan Fan and Lifeng Wang.

Extras

Blank Analysis Seminar Template