antipodal points

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antipodal points

[an¦tip·əd·əl ′pȯins]
(mathematics)
The points at opposite ends of a diameter of a sphere.
References in periodicals archive ?
That is, any two great circles on the sphere meet at a pair of antipodal points.
There are 18 other strict rules covering antipodal points, East/West co-ordinates, independent adjudication, log books, witnesses, pre-travel engineering checks, and driving times.
On the other hand, Borsuk's theorem only requires the mapping f to be continuous on the ball and to fulfill a non-colinearity condition for the function values at all pairs of antipodal points on the boundary of the ball.