19 citations · 37 across the 4 of their papers we have counts for
4 papers
Goethals--Seidel difference families with symmetric or skew base blocks
Dragomir Z. Djokovic, Ilias S. Kotsireas
We single out a class of difference families which is widely used in some constructions of Hadamard matrices and which we call Goethals--Seidel (GS) difference families. They consi…
D-optimal matrices of orders 118, 138, 150, 154 and 174
Dragomir Z. Djokovic, Ilias S. Kotsireas
We construct supplementary difference sets (SDS) with parameters , , , and . These SDSs give D-optimal d…
Four-qubit pure states as fermionic states
Lin Chen, Dragomir Z. Djokovic, Markus Grassl +1
The embedding of the -qubit space into the -fermion space with modes is a widely used method in studying various aspects of these systems. This simple mapping raises a c…
Generalization of Mirsky's theorem on diagonals and eigenvalues of matrices
Dragomir Z. Djokovic
Mirsky proved that, for the existence of a complex matrix with given eigenvalues and diagonal entries, the obvious necessary condition is also sufficient. We generalize this theore…