Speaker: Yang Liu, Stanford University Date: Monday, April 10 Time: 12:30pm EST Location: CS 105 Host: Gillat Kol Event page: https://www.cs.princeton.edu/events/26400 Title: Graphs, Optimization, Geometry, and Fast Algorithms Abstract: Discrete combinatorial structures such as graphs and Boolean matrices are prevalent in modern computation. The massive size of modern data motivates the design of efficient algorithms for processing these combinatorial datasets. In this talk, I will describe how to use techniques from continuous optimization and geometry to gain insights into the structure of problems in these combinatorial settings. Using these insights, I will present new efficient algorithms for several fundamental problems at the intersection of combinatorial algorithms, continuous optimization, and high-dimensional geometry, including maximum flows in almost linear time, discrepancy minimization, and linear regression. We conclude by discussing the exciting new lines of research and open problems that these techniques have opened up. Bio: Yang P. Liu is a fifth year PhD student at Stanford advised by Aaron Sidford. He completed his undergraduate studies at MIT in 2018. He has broad interests in computer science, and his research focuses on the design of efficient algorithms based on graph theory, convex optimization, and high-dimensional geometry. His work has been recognized by ITCS and STOC best student paper awards, and a FOCS best paper award.