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Ree geometries

  • Fabienne Haot EMAIL logo , Koen Struyve and Hendrik Van Maldeghem
Published/Copyright: April 13, 2010
Forum Mathematicum
From the journal Volume 23 Issue 1

Abstract

We introduce a rank 3 geometry for any Ree group over a not necessarily perfect field and show that its full collineation group is the automorphism group of the corresponding Ree group. A similar result holds for two rank 2 geometries obtained as a truncation of this rank 3 geometry. As an application, we show that a polarity in any Moufang generalized hexagon is unambiguously determined by its set of absolute points, or equivalently, its set of absolute lines.

Received: 2008-01-04
Published Online: 2010-04-13
Published in Print: 2011-January

© de Gruyter 2011

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