Differential Geometry Seminar

Schedule .Date: 29 Apr., 2025Speaker: Gerard Misiolek (University of Notre Dame) Title: Diffeomorphism groups and information geometryAbstract: The pioneering work of V. Arnold in the 1960s introduced spaces of diffeomorphisms into the study of hydrodynamics. Motions of an ideal fluid in a fixed domain were recognized as geodesics in the group of volume-preserving diffeomorphisms equipped with ...

报告人：Gerard Misiolek (University of Notre Dame)

Tsinghua-BIMSA symplectic geometry seminar

Schedule:April 28, 2025 Dylan AllegrettiTitle: Categorification of skein algebrasAbstract: The skein algebra of a surface is a noncommutative algebra that quantizes the SL(2,C)-character variety of the surface. It has been intensively studied in quantum topology for more than thirty years. In an influential paper from 2014, D. Thurston suggested that the skein algebra should have a natural cate...

报告人：Dylan Allegretti

YMSC Topology Seminar

Nearly geodesic surfaces are filling Xiaolong HAN 韩肖垄, SIMIS and Fudan (2025-04-28)Abstract:A surface S in a manifold M is filling if S cuts M into contractible components. We prove for any closed hyperbolic 3-manifold M, there exists a K", g>0 such that every homotopy class of K-quasi-Fuchsian surfaces with 1

报告人：Xiaolong HAN 韩肖垄 (SIMIS)

Quantum Scientific Computation and Quantum Artificial Intelligence量子科学计算与量子人工智能

Upcoming talk: Speaker: Yuxin ZhangTime: 16:00-17:00, Apr. 25, 2025Venue：Ningzhai 104; Tencent Meeting (VooV Meeting): 603-0692-7681Title: Quantum singular value transformation without block encodingsAbstract: Quantum singular value transformation (QSVT) is a unifying framework that encapsulates most known quantum algorithms. However, existing implementations rely on block encoding, incurring ...

报告人：Yuxin Zhang

Geometric Representation Theory Seminar

Upcoming talks04/25 Henry Liu 刘华昕 (Kavli IPMU)Vertex coalgebras and quantum loop algebrasJoyce recently gave a geometric construction of a vertex coalgebra structure on the cohomology of appropriate moduli stacks of linear objects like quiver representations or coherent sheaves. In appropriate settings, Latyntsev showed that this vertex coalgebra is compatible with cohomological Hall algebra...

报告人：Henry Liu (Kavli IPMU)