Link from Dylan
September-03-09
5:30 PM
Date: Wed, 2 Sep 2009 17:58:51 -0400
From: Dylan Thurston
To: Dror Bar-Natan <drorbn@math.toronto.edu>
Subject: Visiting Toronto
Hello Dror,
[...]
I also wanted to mention this amazing Seifert surface in downtown
Philadelphia that I recently saw:
[link]
It's called "Triune" by Robert Engman.  I would add it to the Knot
Atlas, but I haven't yet located the link in the tables.  (It's the
trefoil with a core of one solid torus added.)
Best,
        Dylan
See also MathematicaNotebooks/LinkFromDylan at [link] and [link]