Constrained knots in lens spaces

Abstract

This paper studies a special family of (1,1) knots called constrained knots, which includes 2-bridge knots and simple knots. They are parameterized by five parameters and characterized by the distribution of spin^c structures of intersection points in (1,1) diagrams. Their knot Floer homologies are calculated and the complete classification is obtained. Some examples of constrained knots come from links related to 2-bridge knots and 1-bridge braids. As an application, Heegaard Floer theory is studied for orientable 1-cusped hyperbolic manifolds that have ideal triangulations with at most 5 ideal tetrahedra.