Seminarium z Topologii Algebraicznej
Wtorki, 14:30-16:00, sala 4070
Maciej Borodzik
O topologicznych homologiach Hochschilda i geometryczności Z w stabilnej teorii homotopii
08.03.2016
Streszczenie:
It is known that for links S^n in S^{n+k}, concordance
implies isotopy, as long as k>2. It is known that concordance does not
imply isotopy for k=2. We prove that for k=2, concordance implies
regular homotopy. Generalizations apply for non-spherical codimension 2
embeddings. The main tool is embedded Morse theory introduced by Sharpe
and developed further by Mark Powell and the author. This is a joint
project with Mark Powell.