Abstract:I will discuss some new bounds on the spectra of Laplacian operators on hyperbolic 3-manifolds. One example of such a bound is that the spectral gap of the Laplace-Beltrami operator on a closed orientable hyperbolic 3-manifold must be less than 47.32, or less than 31.57 if the first Betti number is positive. The bounds are derived using two approaches, both of which employ linear prog...
YMSC Topology SeminarOrganizers:陈伟彦、高鸿灏、黄意、林剑锋、邱宇、孙巍峰Speaker:Zhenghao RAO 饶正昊, RutgersTime:Tuesday, 16:30-17:30Dec. 23, 2025Venue:C654, Shuangqing Complex Building AZoom meeting ID: 405 416 0815, PW: 111111Title:Immersed incompressible surfaces in hyperbolic manifoldsAbstract:The study of surface subgroups in 3-manifolds has drawn sustained attention for decades, mo...