4:00pm to 5:00pm - RH 306 - Applied and Computational MathematicsSolmaz Kia - (Mechanical and Aerospace Eng. Dept., University of California Irvine)TBA |

4:00pm - ISEB 1200 - Differential GeometryPak-Yeung Chan - (UC San Diego)Hamilton-Ivey estimates for gradient Ricci solitons One special feature for the Ricci flow in dimension 3 is the |

2:00pm to 3:00pm - 510R Rowland Hall - Combinatorics and ProbabilityRoman Vershynin - (UCI)Mathematics of synthetic data. II. Random walks. In this talk we will construct a superregular random walk, which locally looks like a simple random walk, but which globally deviates from the origin much slower than the Brownian motion. This random walk will become a crucial tool in the construction of a private measure. Joint work with March Boedihardjo and Thomas Strohmer, https://arxiv.org/abs/2204.09167 |

10:00am to 11:00am - Zoom - Number TheoryAmita Malik - (Max Planck Institute)TBA |

11:00am - RH 306 - Harmonic AnalysisYizhe Zhu - (UCI)The characteristic polynomial of sums of random permutations Let $A_n$ be the sum of $d$ permutations matrices of size $n×n$, each drawn uniformly at random and independently. We prove that $\det( I_n−zA_n/\sqrt{d})$ converges when $n\to\infty$ towards a random analytic function on the unit disk. As an application, we obtain an elementary proof of the spectral gap of random regular digraphs with a sharp constant. Our results are valid both in the regime where $d$ is fixed and for $d$ slowly growing with $n$. Joint work with Simon Coste and Gaultier Lambert. |

1:00pm - Rowland 510R - AlgebraCris Negron - (University of Southern California)Vanishing tests for (quantum) group representations In this talk I will survey some results on the vanishing of (quantum) group representations, at the level of the stable category. Equivalently, I will discuss effective ways to test projectivity of a given finite-dimensional G-representation, where G your favorite finite (quantum) group. In the case of an elementary abelian p-group E, over k=\bar{ |

4:00pm to 5:00pm - MSTB 124 - Graduate SeminarConnor Mooney - (UC Irvine)TBA |