Mathematical Notes

E. F. Beckenbach and Karl Menger
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E. F. Beckenbach: University of California
Karl Menger: Illinois Institute of Technology

A chapter in Selecta Mathematica, 2002, pp 473-474 from Springer

Abstract: Abstract In the geometry of our ordinary plane, points and lines play different rôles. There exist parallel lines, that is, lines which are not on a common point. In fact, for any given line l, there exists exactly one parallel line on every point which is not on l But there are no parallel points, in the sense of points which are not on a common line. Every two distinct points are on exactly one common line.

Date: 2002
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-7091-6110-4_34

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DOI: 10.1007/978-3-7091-6110-4_34

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