diametrically opposed

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References in periodicals archive ?
Plane elliptic geometry is closely related to spherical geometry, but it differs in that antipodal points on the sphere are identified.
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.
The first strict circumnavigation, covering two antipodal points, was made by Lowell Smith and Leslie Arnold in two US Army Douglas DWC seaplanes in 57 legs beginning and ending in Chicago in 1924
The Guinness book of world record rules require competitors to travel at least 18,000 miles by land and 8,000 by sea or air, via two antipodal points.