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math.CO2014
Hadamard Structures with Associated Automorphisms
Ivica Martinjak
In this paper we present new Hadamard matrices and related combinatorial structures. In particular, it is constructed 5202 inequivalent Hadamard matrices of order 36 as well as 180…
math.CO2014
Some Families of Identities for Integer Partition Function
Ivica Martinjak, Dragutin Svrtan
We give a series of recursive identities for the number of partitions with exactly parts and with constraints on both the minimal difference among the parts and the minimal par…
math.CO2014
A class of symmetric association schemes as inclusion of biplanes
Ivica Martinjak
Let be a nontrivial biplane of order represented by symmetric canonical incidence matrix with trace . We proved that includes a partial…