Universität Potsdam, Institut für Mathematik, Postfach 60 15 53, D-14415 Potsdam, Germany
Abstract: This paper begins with weak assumptions and develops its conclusions from orthogonality and reflection, in conjugation with certain meta-theoretical arguments. The symmetry of orthogonality and certain reflection-geometrical representations are of particular interest.
Some lower levels of Euclidean planes are discussed.
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