82 citations · 311 across the 36 of their papers we have counts for
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math.CO2009★ 3 cited
Some new near-normal sequences
Dragomir Z. Djokovic
The normal sequences NS(n) and near-normal sequences NN(n) play an important role in the construction of orthogonal designs and Hadamard matrices. They can be identified with certa…
math.CO2009
Rational Orthogonal versus Real Orthogonal
Dragomir Z. Djokovic, Simone Severini, Ferenc Szollosi
The main question we raise here is the following one: given a real orthogonal n by n matrix X, is it true that there exists a rational orthogonal matrix Y having the same zero-patt…
math.CO2009★ 6 cited
Classification of near-normal sequences
Dragomir Z. Djokovic
We introduce a canonical form for near-normal sequences NN(n), and using it we enumerate the equivalence classes of such sequences for even n up to 30. These sequences are needed f…