Common to the two geometries is only the general property of one-to-one correspondence, and the rule that this correspondence determines straight lines as shortest lines as well as their relations of intersection. (Hans Reichenbach)

Common to the two geometries is only the general property of one-to-one correspondence, and the rule that this correspondence determines straight lines as shortest lines as well as their relations of intersection.

Hans Reichenbach

Related topics

common correspondence general intersection property rule straight well relations lines one-to-one

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