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DIFFERENCE SETS by M HALL
Invariant relations coherent configurations
3 other sections not shown
2-transitive 2-transitive on points 2-transitive symmetric designs 3-design adjacent affine space algebra Amer assume automorphism group Buekenhout CAMERON characterization coherent configuration collineation groups contains cyclic DEMBOWSKI 40 difference set Doubly transitive groups element of G example finite groups fixed points G fixing G is transitive G-orbits G-space geometric GF(q graph group G group-theoretic Hadamard design Hadamard matrices HIGMAN implies incidence matrix incidence structure integer involution irreducible representations isomorphic KANTOR 93 known lines London Math Mathieu groups multiplier non-trivial normal subgroup O'NAN orbits pair parameters points and blocks polar space prepolar space primitive permutation groups Proc projective space proof properties proved PSL(d+l,q quadrangles rank regular normal subgroup relation satisfy SHULT simple groups SIMS st st Steiner system subdegrees subgroup of G suborbits subspace symmetric block design theorem transitive permutation groups Univ vertices WIELANDT