Subject: Unknotting algorithm
Date: Sat, 17 Feb 2001 18:00:12 -0000
From: "Brian Sanderson" <bjs@maths.warwick.ac.uk>
To: "Don Davis" <dmd1@lehigh.edu>

How long does it take to see if a knot diagram with n crossings represents
the unknot? I believe a bound on the number of steps needed to perform
Haken's algorithm  has been found recently.

Brian Sanderson