Abstract
This paper deals with block-transitive t-(v, k, λ) designs in affine spaces for large t, with a focus on the important index λ = 1 case. We prove that there are no non-trivial 5-(v, k, 1) designs admitting a block-transitive group of automorphisms that is of affine type. Moreover, we show that the corresponding non-existence result holds for 4-(v, k, 1) designs, except possibly when the group is 1-D affine. Our approach involves a consideration of the finite 2-homogeneous affine permutation groups.
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Communicated by Ron Mullin/Rainer Steinwandt.
To Spyros Magliveras on the occasion of his 70th birthday.
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Huber, M. Block-transitive designs in affine spaces. Des. Codes Cryptogr. 55, 235–242 (2010). https://doi.org/10.1007/s10623-009-9338-3
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DOI: https://doi.org/10.1007/s10623-009-9338-3
Keywords
- Combinatorial design
- Finite affine space
- Block-transitive group of automorphisms
- Triply transitive permutation group
- Doubly homogeneous permutation group