Abstract
The Dembowski semi-planes are the semi-planes which were determined by P. Dembowski [3]. A Dembowski semi-i-space (i⩾1) is an incidence structure J=(P,B,I) for which: (i) each element of B is incident with at least i+3 elements of P, and (ii) each i-residual space of J is a Dembowski semi-plane. The article [5] contained the complete classification of all Dembowski semi-1-spaces, in this article we classify all Dembowski semi-2-spaces.
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Willems, M.L.H., Mielants, W. Dembowski semi-2-spaces. J Geom 22, 117–130 (1984). https://doi.org/10.1007/BF01222835
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DOI: https://doi.org/10.1007/BF01222835