Slides from a talk on the proof of the Disc Embedding Theorem in Workshop on Interactions of 3- and 4-dimensional topology.
Video and notes from a talk on Shake slice knots in the Knot theory Online Seminar, May 2020.
Notes from an online talk on Slice Discs for the Brandeis Topology Seminar, March 2020.
Slides of a talk on Shake slice knots for Fico González-Acuña's Low Dimensional Topology Seminar, via videolink to Mexico, March 2020.
Extended abstract of a survey lecture in Oberwolfach, February 2020, on Developments in 4-manifolds. Here is an article about that conference that mentions my talk.
Expository slides which survey the contents of Peter Teichner's Lecture notes on Slice Knots.
A talk on a 2nd order algebraic concordance group, December 2011.
A talk on Casson-Gordon style obstructions to a 2-component link with linking number one being concordant to the Hopf link, March 2012.
A talk on New Uses for the Alexander Invariant, March 2012.