Mention308442

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so:text ...the relation of betweenness on the torus is undetermined for curves that cannot be contracted to a point , i.e., for three of such curves it is not uniquely determined which of them lies between the other two. ..This indeterminateness... has the consequence that such a curve does not divide the surface of the torus into two separate domains; between points to the "right" and to the "left" of the line. (en)
so:isPartOf https://en.wikiquote.org/wiki/Hans_Reichenbach
so:description ยง 12 (en)
so:description The Philosophy of Space and Time (1928, tr. 1957) (en)
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