Random
April-06-09
11:30 PM
Following a conversation with Turchin - might it be that the right way to frame a virtual knot is to take it along with a homotopy class of paths from it to the unknot?
Take a look at "The Integral Cohomology of the Group of Loops", by Jensen, McCammond and Meier.
What are spun knots? Are they always ribbon?