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SUMMARY:Linking of 2-spheres in 4-space [MPIM]
DTSTART:20250617T090000Z
DTEND:20250617T100000Z
DTSTAMP:20260415T092700Z
UID:indico-event-500@math-events.uni-bonn.de
DESCRIPTION:Speakers: Robert Schneiderman (Lehman College CUNY)\n\nLow-dim
 ensional topology seminar \nThe notion of link homotopy\, or “linking 
 modulo knotting”\, was introduced by Milnor for classical links in 1954\
 , when he showed that his non-repeating mu-invariants give the complete ob
 struction to a link being link-homotopically trivial. \n \nIn the settin
 g of link homotopy for 2-spheres in 4-space fundamental differences from t
 he classical setting quickly appear\, and this talk will describe results 
 and open questions\, from the first nontrivial examples to the 2-component
  classification and new 3-component phenomena. \n\nhttps://math-events.un
 i-bonn.de/event/500/
LOCATION:MPIM\, Vivatsgasse\,  7 - Lecture Hall (Max Planck Institute for 
 Mathematics)
URL:https://math-events.uni-bonn.de/event/500/
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