The double-tipping nullhomotopy
we collect animations and demonstrations supplementing
our article "How efficiently
can one untangle a double-twist? Waving is
believing!" (to appear in the Mathematical
Pengelley and Daniel Ramras
Animations and Demonstrations:
video showing eight incremental stages of
- Virtual reality
demonstrations of the nullhomotopy, designed by the MEGL lab at
George Mason University, are available here
(scroll down). Note that while these demonstrations
are designed for the Oculus Rift, they are also quite
fun to play with on a desktop computer, and are less
likely to induce vomiting when viewed that way.
Belt Trick. A video demonstration of the belt
The Candle Dance. A video demonstration of the
is Believing! A video explaining how to "wave" a
nullhomotopy of the double twist with your right hand.
Waving. A video showing 9 simultaneous "waves"
of the double-tipping nullhomotopy.