Journal of Geometry

, Volume 74, Issue 1–2, pp 86–89 | Cite as

A characterisation of classical unitals

  • Luca Giuzzi


A short proof is given for the main result of [1]:¶¶THEOREM 1. A unital in PG(2,q) is classical if and only if it is preserved by a cyclic linear collineation group of order \( q - \sqrt{q} +1 \).

Key words: Unitals, Singer cyclic groups, finite projective planes. 


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Copyright information

© Birkhäuser Verlag Basel, 2002

Authors and Affiliations

  • Luca Giuzzi
    • 1
  1. 1.Dipartimento di Matematica, Facoltà di Ingegneria, Università degli studi di Brescia, via Valotti 9, 25133 Brescia, Italy, e-mail: IT

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