Authors: Kelly McKennon
Descriptions of 1-dimensional projective space in terms of the cross ratio, in one-dimensional geometry as a projective line, in two-dimensional geometry as a circle, and in three-dimensional geometry as a regulus. A characterization of projective 3-space is given in terms of polarity. This paper differs from the original version by addition of a section showing that the circle is distinguished from other meridians by its compactness and the existence of exponential functions.
Comments: 114 pages and 24 figures.
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[v1] 2013-06-29 12:21:12
[v2] 2013-12-31 19:09:35
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