Now showing items 1-2 of 2

  • Automorphisms of Pairwise Combinatorial Designs 

    Ó Catháin, Padraig (2012-02-14)
    In this thesis, we investigate group actions on certain families of pairwise combinatorial designs, in particular Hadamard matrices and symmetric 2-(4t-1, 2t-1, t-1) designs. A Hadamard matrix H is called cocyclic if a ...
  • Topics in cocyclic development of pairwise combinatorial designs 

    Egan, Ronan (2015-10-14)
    This thesis is a compilation of results dealing with cocyclic development of pairwise combinatorial designs. Motivated by a classification of the indexing and extension groups of the Paley Hadamard matrices due to de ...