Date: | February 27, 2017 |

Time: | 2:00PM - 3:00PM |

Location: | BLOC 220 |

Speaker: | Xin Ma, Texas A&M University |

Title: | Tower dimension of Z^d actions II |

Date: | February 27, 2017 |

Time: | 4:00PM - 5:00PM |

Location: | BLOC 220 |

Speaker: | Helen Moore, Bristol-Myers Squibb |

Title: | Mathematical Modeling in the Biopharma Industry |

Abstract: | Abstract: I will present three topics: 1) optimal control for drug regimen optimization, 2) tumor dynamics modeling for immunotherapy, and 3) getting a job in industry. 1)Combination therapy is increasingly important, but it can be challenging to determine the best possible dose levels to use. Instead of running experiments with all possible combinations of dose levels, we can use mathematical modeling and optimal control to predict the best regimen. This prediction can then be tested experimentally. I will show an example for optimizing combination therapy for patients with chronic myeloid leukemia, with constraints on the allowed dose levels. 2)Mathematical models have been used for years to describe tumor size dynamics in patients who have received treatment. With the recently-available immunotherapies, I proposed a new mathematical model to try to better capture the different observed tumor dynamics. I will use some standard methods used in the biopharma industry to compare previous models with the new model and to examine how well they fit the data. 3) Where are job openings for industry found, what background are companies looking for, and what should you include on a resume? I will give pointers for each of these questions. |

Date: | March 1, 2017 |

Time: | 1:00PM - 2:00PM |

Location: | BLOC 624 |

Speaker: | Konrad Wrobel, Texas A&M University |

Title: | Free Subshifts with Invariant Measures from the Lovasz Local Lemma |

Date: | March 1, 2017 |

Time: | 2:00PM - 2:50PM |

Location: | BLOC 628 |

Speaker: | Yongbin Ruan , University of Michigan |

Title: | (Colloquium Talk) Landau-Ginzburg/Calabi-Yau correspondence |

Abstract: | Given quasi-homogeneous polynomial W, we can study it in two different areas of mathematics. Namely, we can set W=0 to define a hypersurface X_W of Weight projective space or we can compute its Jacobian ring C[x_1, \cdots, x_n] / \partial W. The later is the subject of singularity theory or Landau-Ginzburg model. An old theorem said that the middle cohomology of X_W can be computed using Jacobian ring. Motivated by physics, we can attach a range of invariants to X_W as well as the Landau-Ginzburg side of W. The effort to connect two subject leads to Landau-Ginzburg/Calabi-Yau correspondence, a famous duality from physics. In the talk, I will survey some of developments about this duality. |

Date: | March 2, 2017 |

Time: | 4:00PM - 5:00PM |

Location: | BLOC 220 |

Speaker: | Jeffrey Lagarias, University of Michigan |

Title: | Polynomial splitting measures and cohomology of the pure braid group |

Abstract: | See link below. |

Date: | March 3, 2017 |

Time: | 1:50PM - 2:50PM |

Location: | BLOC 628 |

Speaker: | Jeffrey Galkowski, McGill University |

Title: | Scarring and L^\infty norms of Eigenfunctions |

Abstract: | We study the relationship between L^\infty growth of eigenfunctions and their L^2 concentration as measured by defect measures. In particular, we show that scarring in the sense of concentration of defect measure on certain submanifolds is incompatible with maximal L^\infty growth. In addition, we show that a defect measure which is too diffuse, such as the Liouville measure, is incompatible with maximal eigenfunction growth. |

Date: | March 3, 2017 |

Time: | 3:00PM - 4:00PM |

Location: | BLOC 220 |

Speaker: | Beatrice-Helen Vritsiou, University of Michigan |

Title: | tba |

Abstract: | tba |

Date: | March 3, 2017 |

Time: | 3:00PM - 3:50PM |

Location: | BLOC 628 |

Speaker: | Yuyu Zhu, Texas A&M University |

Title: | TBA |

Date: | March 3, 2017 |

Time: | 4:00PM - 5:00PM |

Location: | BLOC 220 |

Speaker: | Ken Dykema, Texas A&M University |

Title: | Commuting operators in finite von Neumann algebras |

Abstract: | We find a joint spectral distribution measure for families of commuting elements of a finite von Neumann algebra. This generalizes the Brown measure for single operators. Furthermore, we find a lattice (based on Borel sets) consisting of hyperinvariant projections that decompose the spectral distribution measure. This leads to simultaneous upper triangularization results for commuting operators and behaves well with multivariate holomorphic functional calculus. (Joint work with Ian Charlesworth, Fedor Sukochev and Dmitriy Zanin.) |

Date: | March 8, 2017 |

Time: | 1:45PM - 2:45PM |

Location: | BLOC 220 |

Speaker: | Madeline Locus, Emory University |

Title: | Conjugacy growth series for wreath products of finitary permutation groups |

Abstract: | We examine the conjugacy growth series of all wreath products of the finitary permutation groups Sym(X) and Alt(X) for an infinite set X. We determine their asymptotics, and we characterize the limiting behavior between the Sym(X) and Alt(X) wreath products. In particular, their ratios form a limit if and only if the dimension of the symmetric wreath product is twice the dimension of the alternating wreath product. |

Date: | March 8, 2017 |

Time: | 2:00PM - 2:50PM |

Location: | BLOC 628 |

Speaker: | Jianchao Wu, Penn State |

Date: | March 8, 2017 |

Time: | 3:00PM - 4:00PM |

Location: | BLOC 628 |

Speaker: | William Layton, University of Pittsburgh |

Title: | Numerical analysis of ensemble algorithms for fluid flow simulations |

Abstract: | One source of error in flow simulations is imprecise initial conditions (and other data) as magnified by exponential separation of trajectories in the NSE. Normally this is treated by computing an ensemble of solutions whereupon averaging gives the most likely prediction and the distribution about the mean is used to assess the predictions reliability. In GFD ensemble computation is widely reported to have doubled the predictability horizon even with ensemble sizes of 5-9 realizations. However, ensemble computations lead to an inevitable competition between mesh resolution for each realization and ensemble computation. This talk will present algorithms and their numerical analysis addressing this competition. New questions lead to new algorithms and new algorithms lead to new models and more questions. This talk is based is joint work with Nan Jiang [Missouri S&T], https://sites.google.com/a/mst.edu/jiangn/home. |

Date: | March 8, 2017 |

Time: | 6:00PM - 7:00PM |

Location: | BLOC 220 |

Speaker: | Thomas Mertink, Willis Towers Watson |

Title: | TBA |

Date: | March 10, 2017 |

Time: | 4:00PM - 5:00PM |

Location: | BLOC 628 |

Speaker: | Scott Aaronson, UT Austin |

Title: | TBA |

Date: | March 17, 2017 |

Time: | 3:00PM - 4:00PM |

Location: | BLOC 220 |

Speaker: | Andrew Swift, Texas A&M Univeristy |

Title: | tba |

Abstract: | tba |

Date: | March 22, 2017 |

Time: | 1:45PM - 2:45PM |

Location: | BLOC 220 |

Speaker: | Michael Zieve, University of Michigan |

Title: | TBA |

Date: | March 24, 2017 |

Time: | 1:50PM - 2:50PM |

Location: | BLOC 628 |

Speaker: | Peter Hintz, University of California, Berkeley |

Title: | TBA |

Date: | March 24, 2017 |

Time: | 3:00PM - 4:00PM |

Location: | BLOC 220 |

Speaker: | Petros Valettas, University of Missouri |

Title: | tba |

Date: | March 24, 2017 |

Time: | 3:00PM - 3:50PM |

Location: | BLOC 628 |

Speaker: | Xingwei Wang , Nankai University and Texas A&M University |

Title: | TBA |

Date: | March 24, 2017 |

Time: | 4:00PM - 5:00PM |

Location: | BLOC 628 |

Speaker: | Robert Williams, TAMU |

Title: | TBA |

Abstract: | TBA |

Date: | March 25, 2017 |

Time: | 09:00AM - 5:00PM |

Location: | BLOCKER |

Speaker: | Brazos Analysis Seminar |

Title: | Brazos Analysis Seminar |

Date: | March 26, 2017 |

Time: | 09:00AM - 5:00PM |

Location: | BLOCKER |

Speaker: | Brazos Analysis Seminar |

Title: | Brazos Analysis Seminar |