Coding Theory and Design Theory

- Part I.- Baer subplanes, ovals and unitals.- On the length of codes with a given covering radius.- The differential encoding of coset codes by algebraic methods.- Families of codes with few distinct weights from singular and non-singular Hermitian varieties and quadrics in projective geometries and Hadamard difference sets and designs associated with two-weight codes.- Perfect multiple coverings in metric schemes.- Nonlinear feedforward sequences of m-sequences II.- Loops of clutters.- Positive independence and enumeration of codes with a given distance pattern.- Bounds on the number of pairs of unjoined points in a partial plane.- Inside Euclid’s algorithm.- Construction of designs.- Algebraic geometric codes.- Combinatorial characters of quasigroups.- Self-dual codes and self-dual designs.- The incidence algebra of a uniform poset.- Some recent results on signed graphs with least eigenvalues ? ?2.- Self-orthogonal codes and the topology of spinor groups.