ABSTRACT
A recent postcard from a friend, Nob Yoshigahara in Tokyo, asked me
to imagine an ant crawling on the walls, floor and ceiling of a 1 x 1 x 2
rectangular room as shown in Figure 1. A n ant is positioned at A and
can travel to any other point on the surface of the room. I was asked to
find the farthest point from A and was told it is not the point B\ This
problem is the creation of Yoshiyuki Kotani , a mathematics professor in
Saitama, Japan, and he discovered that the farthest point is not at B
but at a specific place on the far face.
