Reference for Cochran-Orr-Teichner's filtrations on knot concordance

There are summarys of parts of Cochran, Teichner and Orr's paper in:

  • These lecture notes of Peter Teichner, typed up by Julia Collins and Mark Powell;
  • Mark Powell's 2011 Edinburgh PhD thesis;
  • Julia Collins' 2012 Edinburgh PhD thesis.

You'll find all of these references (and I'm sure more besides) at Andrew Ranicki's webpage.

Disclaimer: I'm not a geometric topologist, but as I was in Edinburgh around the time I ended up as one of the examiners of Julia Collins' thesis.