volume 1, issue 1, P88-93 1949
DOI: 10.4153/cjm-1949-009-2
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Abstract: A projective plane geometry π is a mathematical system composed of undefined elements called points and undefined sets of points (at least two in number) called lines, subject to the following three postulates:(P1) Two distinct points are contained in a unique line.(P2) Two distinct lines contain a unique common point.(P3) Each line contains at least three points.