A note on embedding and generating dual polar spaces.
A note on indecomposability of Boolean matrices
A note on inequivalent Hadamard series.
A note on majorization transforms and Ryser’s algorithm
The notion of a transfer (or T -transform) is central in the theory of majorization. For instance, it lies behind the characterization of majorization in terms of doubly stochastic matrices. We introduce a new type of majorization transfer called L-transforms and prove some of its properties. Moreover, we discuss how L-transforms give a new perspective on Ryser’s algorithm for constructing (0; 1)-matrices with given row and column sums.
A note on nonisomorphic Steiner quadruple systems
A note on representing dowling geometries by partitions
We prove that a rank Dowling geometry of a group is partition representable if and only if is a Frobenius complement. This implies that Dowling group geometries are secret-sharing if and only if they are multilinearly representable.
A Note on Supplementary Difference Sets.
A note on -designs with intersection numbers.
A note on the derived semifield planes of order 16.
A note on the independence number of an identically self-dual perfect matroid design.
A note on the realizaiton of distances within sets in euclidean space.
A note on tree realizations of matrices
It is well known that each tree metric M has a unique realization as a tree, and that this realization minimizes the total length of the edges among all other realizations of M. We extend this result to the class of symmetric matrices M with zero diagonal, positive entries, and such that mij + mkl ≤ max{mik + mjl, mil + mjk} for all distinct i,j,k,l.
A parallelogram configuration condition in nets
After describing a (general and special) coordinatization of -nets there are found algebraic equivalents for the validity of certain quadrangle configuration conditions in -nets with small degree .
A problem on matrices
A product theorem for Skolem sequences.
A random walk on the rook placements on a Ferrers board.
A reciprocity theorem for domino tilings.
A Recursive Construction for Room Designs
A recursive construction of 1-rotational Steiner 2-designs.
A Reduction of Lattice Tiling by Translates of a Cubical Cluster.