Higher SPIN alternating sign matrices.
Hrátky s geometrií, čísly a maticemi
Inversion of incidence mappings.
Kasteleyn cokernels.
Latent roots and off-diagonal elements of the association matrix in PBIB designs and the number of associate classes
Linear discrepancy of basic totally unimodular matrices.
Linear preserver of Ferrers vectors
Let be an matrix of zeros and ones. The matrix is said to be a Ferrers matrix if it has decreasing row sums and it is row and column dense with nonzero -entry. We characterize all linear maps perserving the set of Ferrers vectors over the binary Boolean semiring and over the Boolean ring . Also, we have achieved the number of these linear maps in each case.
Minimization of ±1 matrices under line shifts
Modular Difference Sets.
Modular Difference Sets. (Short Communication).
Modular Hadamard matrices and related designs, III.
Multiplicative cones- a family of three eigenvalue graphs.
New symmetric designs from regular Hadamard matrices.
Nilpotent matrices and spectrally arbitrary sign patterns.
Nonexistence results for Hadamard-like matrices.
O Hadamardově determinantu
O počtu tříd silně ekvivalentních incidenčních matic
On a combinatorical problem of K. Zarankiewicz
On a conjecture of the semigroup of fully indecomposable relations
On a construction of regular Hadamard matrices
We give a construction for regular Hadamard matrices of order where is the order of a Hadamard matrix and is the order of a regular Hadamard matrix. The construction can be used to construct regular Hadamard matrices with special properties and includes several constructions which have been given previously. In the final section we consider the case in more detail.