Geometry and Topology of Knots and Links

自20世纪80年代初以来，人们就知道结补满足几何化猜想。因此，结补的几何应该是研究结的一个有用的工具。然而，一般不知道的是如何将结的图与它们的几何结构联系起来，特别是双曲结。在过去的几年里，PI已经找到了基于图的结补的某些几何信息的边界，包括结类的尖端形状和体积的边界。在这个项目中，PI将应用过去几年发展起来的3流形理论技术来结补，以进一步了解它们的几何性质。空间中的闭环可以打结也可以不打结。在数学中，这样的环被称为结。结理论的一个目标是，根据结的快照（图表），确定是否可以在不破坏环的情况下解开结。研究结的一种方法不是考虑结本身，而是考虑从3球中去除结所得到的三维空间，称为结补。PI将利用三维空间或三维流形理论的最新研究进展来研究结。这项研究应用于弦理论和DNA打结等领域。

It has been known since the early 1980's that knot complements satisfy the geometrization conjecture. Thus the geometry of knot complements ought to be a useful tool in the study of knots. However, what is not known in general is how to relate diagrams of knots to their geometric structure, particularly hyperbolic knots. In the last few years, the PI has found bounds on certain geometric information of a knot complement based on a diagram, including bounds on cusp shapes and volumes for classes of knots. In this project, the PI will apply techniques in 3-manifold theory developed in the last few years to knot complements, to further our understanding of their geometric properties.A closed loop lying in space may be knotted or unknotted. In mathematics, such a loop is called a knot. One goal of knot theory is to determine, based on a snapshot of that knot (a diagram), whether it can be unknotted without breaking the loop. A method of studying knots is to consider not the knot itself, but the 3-dimensional space obtained by removing the knot from the 3-sphere, called the knot complement. The PI will use recent advances in the study of 3-dimensional spaces, or 3-manifold theory, to study knots. This research has applications to such areas as string theory and the knotting of DNA.