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On subdesigns of symmetric designs. (English) Zbl 0496.05008


MSC:

05B05 Combinatorial aspects of block designs
05B25 Combinatorial aspects of finite geometries
05B10 Combinatorial aspects of difference sets (number-theoretic, group-theoretic, etc.)
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References:

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[9] Hall, M. Jr.: Difference sets. In: Combinatories. Proceedings (Breukelen 1974), pp. 1-26. Mathematical Centre Tracts57. Amsterdam: Mathematisch Centrum 1974
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[13] Jungnickel, D.: Existence results for translation nets. In: Finite Geometries and Designs (Cameron, Hirschfeld, Hughes, eds.). Proceedings (Isle of Thorns 1980), pp. 172-196. London Mathematical Society Lecture Notes49. Cambridge-London: Cambridge University Press 1981
[14] Jungnickel, D.: On automorphism groups of divisible designs. Canad. J. Math.34, (1982) · Zbl 0465.05011
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[18] Menon, P.K.: On difference sets whose parameters satisfy a certain relation. Proc. Amer. Math. Soc.13, 739-745 (1962) · Zbl 0122.01504 · doi:10.2307/2034166
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[24] Wallis, W.D.: Construction of strongly regular graphs using affine designs. Bull. Austral. Math. Soc.4, 41-49 (1971) · Zbl 0203.30802 · doi:10.1017/S0004972700046244
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