Klein bottles do not intersect themselves in 4d, while the Lawson
Klein bottle does intersect itself. The rotation speed for each of
the six planes around which the Klein bottle rotates can be chosen.
-For the walk-and-turn more, only the rotation speeds around the true
+For the walk-and-turn mode, only the rotation speeds around the true
4d planes are used (the xy, xz, and yz planes). Furthermore, in the
walking modes the walking direction in the 2d base square of the Klein
bottle and the walking speed can be chosen. This program is somewhat
.BR X (1),
.BR xscreensaver (1)
.SH COPYRIGHT
-Copyright \(co 2005-2013 by Carsten Steger. Permission to use, copy,
+Copyright \(co 2005-2014 by Carsten Steger. Permission to use, copy,
modify, distribute, and sell this software and its documentation for
any purpose is hereby granted without fee, provided that the above
copyright notice appear in all copies and that both that copyright
any purpose. It is provided "as is" without express or implied
warranty.
.SH AUTHOR
-Carsten Steger <carsten@mirsanmir.org>, 25-dec-2013.
+Carsten Steger <carsten@mirsanmir.org>, 03-oct-2014.