Results 21 to 30 of about 497 (36)

Steiner t-designs for large t

, 2008
One of the most central and long-standing open questions in combinatorial design theory concerns the existence of Steiner t-designs for large values of t. Although in his classical 1987 paper, L.
A. Betten, A. Delandtsheer, D. Gorenstein, D. Livingstone, D. Pei, D.G. Higman, D.K. Ray-Chaudhuri, D.R. Hughes, D.R. Stinson, D.R. Stinson, F. Buekenhout, F. Buekenhout, G.-C. Rota, H. Lüneburg, H. Wielandt, J. Saxl, J. Tits, J.D. Dixon, J.H. Conway, L. Teirlinck, M. Hall Jr., M. Huber, M. Huber, M. Huber, M. Huber, M.W. Liebeck, M.W. Liebeck, N.D. Tuan, P. Dembowski, P. Kaski, P.J. Cameron, P.J. Cameron, P.J. Cameron, P.J. Cameron, P.J. Cameron, R.A. Fisher, R.E. Block, T.. Beth, W.C. Huffman, W.M. Kantor, W.M. Kantor   +40 more
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Block-Transitive Designs in Affine Spaces

, 2009
This paper deals with block-transitive $t$-$(v,k,\lambda)$ designs in affine spaces for large $t$, with a focus on the important index $\lambda=1$ case.
A. Delandtsheer, B. Huppert, B. Huppert, C. Hering, C. Hering, C.W. Curtis, D.R. Hughes, D.R. Stinson, E. Maillet, J. Bierbrauer, J. Tits, M. Aschbacher, M. Hall Jr., M. Huber, M. Huber, M. Huber, M. Huber, M. Huber, M. Huber, M.W. Liebeck, Michael Huber, P.J. Cameron, R.E. Block, W.M. Kantor, W.M. Kantor, W.O. Alltop   +25 more
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Neighbour transitivity on codes in Hamming graphs

, 2011
We consider a \emph{code} to be a subset of the vertex set of a \emph{Hamming graph}. In this setting a \emph{neighbour} of the code is a vertex which differs in exactly one entry from some codeword.
Cheryl E. Praeger, F.J. MacWilliams, J. Borges, J. Borges, M. Giudici, Neil I. Gillespie, P. Solé, W.C. Huffman, W.W. Peterson   +8 more
core   +1 more source

Nilpotent Singer groups [PDF]

, 2006
Let $N$ be a nilpotent group normal in a group $G$. Suppose that $G$ acts transitively upon the points of a finite non-Desarguesian projective plane $\mathcal{P}$.
Gill, Nick
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Linear spaces with significant characteristic prime

, 2006
Let $G$ be a group with socle a simple group of Lie type defined over the finite field with $q$ elements where $q$ is a power of the prime $p$. Suppose that $G$ acts transitively upon the lines of a linear space $\mathcal{S}$. We show that if $p$ is {\it
Gill, Nick
core   +1 more source

On self-dual MRD codes

, 2015
We determine the automorphism group of Gabidulin codes of full length and characterise when these codes are equivalent to self-dual codes.Comment: Improved exposition according to the referees ...
Nebe, Gabriele, Willems, Wolfgang
core   +1 more source

Classification of flag-transitive Steiner quadruple systems

, 2001
A Steiner quadruple system of order v is a 3-(v,4,1) design, and will be denoted SQS(v). Using the classification of finite 2-transitive permutation groups all SQS(v) with a flag-transitive automorphism group are completely classified, thus solving the ...
Block, Buekenhout, Conway, Curtis, Delandtsheer, Delandtsheer, Delandtsheer, Hanani, Hering, Huppert, Höchsmann, Kantor, Kleidman, Lüneburg, Michael Huber, Zsigmondy   +15 more
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Symmetries of quasiplatonic Riemann surfaces [PDF]

, 2014
We state and prove a corrected version of a theorem of Singerman, which relates the existence of symmetries (anticonformal involutions) of a quasiplatonic Riemann surface $\mathcal S$ (one uniformised by a normal subgroup $N$ of finite index in a ...
Jones, Gareth A., Singerman, David, Watson, Paul D.   +2 more
core  

Unstable maps

, 2018
A map which is non-orientable or has non-empty boundary has a canonical double cover which is orientable and has empty boundary. The map is called stable if every automorphism of this cover is a lift of an automorphism of the map.
Jones, Gareth A.
core  

EMMPRIN Down-regulating miR-106a/b Modifies Breast Cancer Stem-like Cell Properties via Interaction with Fibroblasts Through STAT3 and HIF-1α. [PDF]

Sci Rep, 2016
Liu Y, Zhang J, Sun X, Li M.
europepmc   +1 more source