## Notes on the knot concordance invariant Upsilon

Ozsváth, Stipsicz and Szabó have defined a knot concordance invariant $\Upsilon _K$ taking values in the group of piecewise linear functions on the closed interval [ $0 , 2$ ] . This paper presents a description of one approach to defining $\Upsilon _K$ and proving its basic properties.

Publication Date:
Jan 25 2017
Date Submitted:
Nov 21 2018
ISSN:
1472-2739
Citation:
Algebraic and Geometric Topology
17