中俄数学研究生讨论班——Universal L 2 -torsion detects fibered 3-manifolds
报告人：段剑儒（色控
）
时间：2025-11-21 15：30-16：30
地点：智华楼四元厅
Abstract: It is well-known that the Alexander polynomial of a fibered knot must be monic. But in general the converse is not true. In this talk, we introduce the universal L2 -torsion of a 3-manifold, an invariant defined in analogy with the classical torsion, but using tools from L2 -theory. We will show that this invariant detects fibered 3-manifolds. Moreover, we extend the definition of the universal L2 -torsion to taut sutured 3-manifolds and show that it detects product sutured manifolds.
The talk will be streamed through "VooV": //voovmeeting.com/r/374-057-208.
