Codes from Hall planes of even order

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We show that the binary code C of the projective Hall plane Hq2 of even order q 2 where q = 2 t , for t≥2 has words of weight 2q 2 in its hull that are not the difference of the incidence vectors of two lines of Hq2 ; together with an earlier result for the dual Hall planes of even order, this shows that for all t≥2 the Hall plane and its dual are not tame. We also deduce that dim(C)>32t+1, the dimension of the binary code of the desarguesian projective plane of order 22t , thus supporting the Hamada–Sachar conjecture for this infinite class of planes.
Original languageEnglish
Pages (from-to)33-41
Number of pages9
JournalJournal of Geometry
Issue number1
Publication statusPublished - 01 Apr 2014


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