Department of

# Mathematics

Seminar Calendar
for events the day of Wednesday, October 30, 2013.

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events for the
events containing

Questions regarding events or the calendar should be directed to Tori Corkery.
    September 2013          October 2013          November 2013
Su Mo Tu We Th Fr Sa   Su Mo Tu We Th Fr Sa   Su Mo Tu We Th Fr Sa
1  2  3  4  5  6  7          1  2  3  4  5                   1  2
8  9 10 11 12 13 14    6  7  8  9 10 11 12    3  4  5  6  7  8  9
15 16 17 18 19 20 21   13 14 15 16 17 18 19   10 11 12 13 14 15 16
22 23 24 25 26 27 28   20 21 22 23 24 25 26   17 18 19 20 21 22 23
29 30                  27 28 29 30 31         24 25 26 27 28 29 30



Wednesday, October 30, 2013

1:00 pm in Altgeld Hall,Wednesday, October 30, 2013

#### Fixed points of symplectic circle actions

###### Donghoon Jang (UIUC Math)

Abstract: The study of fixed points of maps is a classical and important topic in geometry and topology. During this talk, we focus on the fixed points of maps in the case where manifolds admit symplectic structures and circle actions on the manifolds preserve the symplectic structures. We discuss main theorems on fixed points of symplectic circle actions and discuss techniques to study, ABBV Localization formula and Atiyah-Singer index formula.

4:00 pm in 245 Altgeld Hall,Wednesday, October 30, 2013

#### Lecture 2: Sharp inequalities. The "why" and the "how".

###### Rodrigo Banuelos (Purdue University)

Abstract: In 1966, D. L. Burkholder published his seminal paper on the boundedness of martingale transform. While the main results were of considerable importance, the ideas introduced in this paper became the building blocks for many subsequent results in martingales, leading to the celebrated Burkholder-Davis-Gundy inequalities (the bread and butter of modern stochastic analysis) and to numerous applications in analysis, including the solution by Burkholder, Gundy and Silverstein of a longstanding open problem concerning a real variables characterization of the Hardy spaces. In 1984, motivated in part by applications to the geometry of Banach spaces, Burkholder gave a new proof of his 1966 inequality which bypassed L2 theory, introducing a novel and revolutionary new method for proving optimal inequalities in probability and harmonic analysis. This method, commonly referred to now days as the "Burkholder method" (and also as "the Bellman function method"), has had many applications in recent years. The aim of these lectures is to present some of these martingale inequalities and applications, emphasizing ideas rather than technicalities, taking a historical point of view but discussing applications to problems of current interest. 
Lecture 1: The 1966 martingale inequalities, the good-principle, some applications. 
Lecture 2: Sharp inequalities. The "why" and the "how".
Lecture 3: Optimal bounds for singular integrals, Fourier multipliers, connections to rank-one convexity, quasi convexity and weighted norm inequalities.

4:00 pm in 245 Altgeld Hall,Wednesday, October 30, 2013

#### Trjitzinsky Memorial Lecture.

###### Rodrigo Banuelos (Purdue University)

Abstract: NOTE UNUSUAL TIME AND PLACE: Students should attend the 4 p.m. Tuesday, Oct 29, Trjitzinsky Memorial Lecture.