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On Sun, 17 Oct 1999 21:28:24 -0500, Larry Fontaine <lfo### [at] isd net>
wrote:
>How is that not a torus? A torus is defined simply as the solid formed by rotating
>a circle around a circular path which is perpindicular to the plane of the circle.
AFAIR, from the point of view of topology, a torus is defined as the
surface formed by moving a closed curve along a smooth (i.e. with a
definite tangent in every point) and closed path with the plane the
curve lies in always perpendicular to the tangent of the path. A
circular torus is a special case.
Peter Popov
ICQ: 15002700
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