Van Kampen - Zeeman Linked Spheres
The figure shows a rendering of the
Van Kampen - Zeeman linked spheres,
two unknotted 2-spheres non-trivially linked in four dimensions.
To see why these spheres are non-trivially linked see
Knots and Links,
The link is obtained by "spinning" the following link
about the indicated plane into four dimensions.
main WWW page.
Robert G. Scharein