Abstract
We develop a structure theory for near polygons with quads. Main results are the existence of sub 2j-gons for 2⩽j⩽d and the nonexistence of regular sporadic 2d-gons for d⩾4 with s>1 and t 2>1 and t 3≠t 2(t 2+1).
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Brouwer, A.E., Wilbrink, H.A. The structure of near polygons with quads. Geom Dedicata 14, 145–176 (1983). https://doi.org/10.1007/BF00181622
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DOI: https://doi.org/10.1007/BF00181622