Abstract
We show that the sets of absolute points of correlations of Desarguesian projective planes do not possess the so-called Pasch (O'Nan) configuration. Previously, this has been known of unitary polarities of planes of square order.
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References
O'Nan, M. E., ‘Automorphisms of unitary block designs’, J. Algebra 20 (1972), 495–511.
Seidenberg, A., Lectures in Projective Geometry, Van Nostrand, 1962.
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This research was supported by New York Institute of Technology.
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Kestenband, B.C. Generalizing a non-existence theorem in finite projective planes. Geom Dedicata 44, 123–126 (1992). https://doi.org/10.1007/BF00182943
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DOI: https://doi.org/10.1007/BF00182943