Pre-Google Calendar Seminar listings

## 2018

Date | Speaker | Title |
---|---|---|

April 23 | George Lusztig | The Lie group of type E8 |

April 2 | Max Engelstein | Not all Critical Points are Minimizers |

March 19 | Philippe Rigollet | The sample complexity of multi-reference alignment |

February 12 | Steven Johnson | Upper bounds on wave-matter interactions |

February 12 | Henry Cohn | The Gaussian core model in high dimensions |

## 2017

Date | Speaker | Title |
---|---|---|

David Jerison | The Two-Hyperplane conjecture | |

Spring | David Vogan | W-Graphs |

Spring | Andrei Negut | Moduli of semistable sheaves and representation theory |

Spring | Andrew Lawrie | Bubbling for geometric wave equations |

Spring | Larry Guth | Using Fourier analysis to study diophantine equations |

## 2013

Date | Speaker | Title |
---|---|---|

May 6 | George Lusztig | Affine Hecke algebras |

April 29 | William Minicozzi | Geometric Flows |

April 22 | Gigliola Staffilani | Dispersive equations and their role beyond PDE |

April 8 | Jacob Fox | The Graph Regularity Method |

February 25 | Scott Sheffield | Log-correlated Gaussian fields |

## 2012

Date | Speaker | Title |
---|---|---|

December 3 | Steven Johnson | Mathematical formulations of radiative heat transfer |

November 19 | Aaron Naber | Quantitative Stratification and regularity for harmonic maps |

October 29 | Bill Minicozzi | Singularities and dynamics of mean curvature flow |

October 15 | Larry Guth | The waist inequality in geometry and combinatorics |

October 1 | Katrin Wehrheim | Moduli spaces of pseudoholomorphic curves |

September 19 | Mark Behrens | Exotic spheres |

May 7 | Goncalo Tabuada | Homological ⊂ Homotopical Algebra |

April 2 | Jared Speck | The Geometric Analysis of Wave Equations |

March 12 | Roman Bezrukavnikov | Representation categories found in algebraic geometry |

February 27 | Lie Wang | Recovery of high dimensional sparse signals |

February 13 | Gigliola Staffilani | Dispersive equations and their role beyond PDE |

## 2011

Date | Speaker | Title |
---|---|---|

December 5 | Mark Behrens | Calculus of functors |

November 21 | Sug Woo Shin | Families and equidistribution |

November 7 | Victor Guillemin | Riemann sums vs. Riemann integrals |

October 24 | Pavel Etingof | The PRIMES progam |

October 3 | Abhinav Kumar | Sphere packing and related optimization problems |

April 25 | Susan J. Sierra (Princeton) | What is a Noncommutative Polynomial Ring? |

April 11 | Katrin Wehrheim | How to construct topological invariants via decompositions and the symplectic category |

March 28 | Richard Melrose | Spin structures and singularities |

March 14 | Tom Mrowka | The strange world of 4-dimensional manifolds |

February 14 | Henry Cohn | Abstract |

## 2010

**Time:** Monday, 12:00 - 1:00pm

**Location:** Room 2-139

**Goodies:** Pizza and beverages will be available at 1pm in 2-290

Date | Speaker | Title |
---|---|---|

December 6 | Davesh Maulik | A classical question in algebraic geometry concerns counting curves in some ambient space. That is, if we fix some discrete parameters and geometric conditions, how many curves are there on an algebraic variety which satisfy these conditions? In the special case when the ambient space is three-dimensional, there are two approaches to these sorts of questions - via counting maps or counting sheaves. In this talk, we will introduce these approaches and explain questions/progress in understanding their relationship to each other. |

November 29 | Abhinav Kumar | The "exceptional" root lattices $E_6$, $E_7$, and $E_8$ arise in the classification of root lattices, Lie algebras and so on. These lattices have many remarkable properties: they are the densest lattices in their dimensions, their root systems have give rise to remarkable spherical codes, with large automorphism groups. These root systems also arise in the consideration of exceptional curves on del Pezzo surfaces in algebraic geometry. I will describe this classical connection, and time permitting, touch on another - that with rational elliptic surfaces. |

November 15 | Martin Bazant | Nonlinear Dynamics of Electrochemical Systems |

November 1 | Jacob Fox | Ramsey Theory |

October 18 | Jonathan Kelner | Electrical Flows, Laplacian Systems and Faster Approximation of Maximum Flow in Undirected Graphs |

October 4 | David Vogan | Unitary Group Representations |

September 20 | Scott Sheffield | How do you divide your (two-dimensional) time? SLE and teh quantum gravity zipper |

April 26 | Abhinav Kumar | What is the densest arrangement of spheres in Euclidean space R^n? The simplest ones to describe are those in which the sphere centers are arranged in a lattice, but even in as low as three dimensions, periodic structures (the Barlow packings) tie with the face-centered cubic (or A_3 lattice) arrangement for the top spot. In ten dimensions, the best packing known (discovered by Best) is periodic and not a lattice. One can attempt to make dense periodic configurations by minimizing (average) potential energy for a suitable potential function, such as a steeply decreasing inverse power law. I will describe recent joint work with Cohn and Schurmann which carries out these computational experiments for Gaussian potential functions, and some surprising results, including the presence of "duals" for some non-lattice periodic structures. |

February 22 | Sigurdur Helgason | This lecture deals with Radon's problem of determining a function f in terms of its integral over certain submanifolds. There are two sides to the problem, namely inversion formulas and support theorems. Several examples of each will be discussed. |

## 2008

**Time:** Tuesday, 12:00 - 1:00pm

**Location:** Room 2-102

**Goodies:** Pizza and beverages will be available at 1pm in 2-290

Date | Speaker | Title |
---|---|---|

December 9 | David Vogan | "The Uncertainty Principle for Algebraists: Research Problems About Diagonalizing Matrices" |

November 18 | Katrin Wehrheim | "Some Connections Between Gauge Theory and Symplectic Topology" |

October 28 | Scott Sheffield | "Random Fractals and Symmetry" |

October 14 | Mark Behrens | TBA |

September 30 | Bjorn Poonen | "Rational Periodic Points of Polynomials" |

September 16 | Tom Mrowka | "Dissecting 3-Manifolds" |

## 2007

**Time:** Monday, 12:00 - 1:00pm

**Location:** Room 2-190

**Goodies:** Pizza and beverages will be available at 1pm in 2-290

Date | Speaker | Title |
---|---|---|

December 10 | Lars Hesselholt | Higher algebraic K-theory |

December 3 | Richard Melrose | Configuration spaces and Magnetic Monopoles |

November 26 | Ju-Lee Kim | Harmonic analysis on $SL_2 (R)$ |

November 19 | Mike Artin | Noncommutative Surfaces Birationally = Skew Fields of Dimension Two |

November 5 | John Bush | Rationalizing Nature's Designs |

October 29 | Toby Colding | Change of width under flows |

October 22 | James McKernan | A tour through birational geometry |

October 15 | David Vogan | How big is infinite-dimensional |

October 1 | Richard Stanley | Combinatorics and Representation Theory |

September 17 | Jacob Lurie | Topological Quantum Field Theories in Low Dimensions |

September 10 | Pavel Etingof | Double affine Hecke algebras |