11 citations · 35 across the 9 of their papers we have counts for
9 papers
Random discrete copulas
Damjana Kokol Bukovšek, Blaž Mojškerc, Nik Stopar
We introduce the notion of a bivariate random discrete copula on an equidistant mesh and explore its stochastic properties. A random discrete copula is a discrete random field, hen…
Compressed commuting graphs of matrix rings
Ivan-Vanja Boroja, Hamid Reza Dorbidi, Damjana Kokol Bukovšek +1
In this paper we introduce compressed commuting graph of rings. It can be seen as a compression of the standard commuting graph (with the central elements added) where we identify…
Symmetric Nonnegative Matrix Trifactorization
Damjana Kokol Bukovšek, Helena Šmigoc
The Symmetric Nonnegative Matrix Trifactorization (SN-Trifactorization) is a factorization of an nonnegative symmetric matrix of the form , where is a $…
Completely positive factorizations associated with Euclidean distance matrices corresponding to an arithmetic progression
Damjana Kokol Bukovšek, Thomas Laffey, Helena Šmigoc
Euclidean distance matrices corresponding to an arithmetic progression have rich spectral and structural properties. We exploit those properties to develop completely positive fact…
Relation between non-exchangeability and measures of concordance of copulas
Damjana Kokol Bukovšek, Tomaž Košir, Blaž Mojškerc +1
An investigation is presented of how a comprehensive choice of five most important measures of concordance (namely Spearman's rho, Kendall's tau, Gini's gamma, Blomqvist's beta, an…
Jordan triple product homomorphisms on Hermitian matrices to and from dimension one
Damjana Kokol Bukovsek, Blaz Mojskerc
We characterise all Jordan triple product homomorphisms, that is, mappings satisfying from the set of all Hermitian complex matrices to…
Diameters of commuting graphs of matrices over semirings
David Dolžan, Damjana Kokol Bukovšek, Polona Oblak
We calculate the diameters of commuting graphs of matrices over the binary Boolean semiring, the tropical semiring and an arbitrary nonentire commutative semiring. We also find the…
Semitransitive subsemigroups of the singular part of the finite symmetric inverse semigroup
Karin Cvetko-Vah, Damjana Kokol Bukovšek, Tomaž Košir +1
We prove that the minimal cardinality of the semitransitive subsemigroup in the singular part $\IS_n\setminus §_n$ of the symmetric inverse semigroup $\IS_n$ is , where …
Semitransitive and transitive subsemigroups of the inverse symmetric semigroups
Karin Cvetko-Vah, Damjana Kokol Bukovšek, Tomaž Košir +3
We classify minimal transitive subsemigroups of the finitary inverse symmetric semigroup modulo the classification of minimal transitive subgroups of finite symmetric groups; and s…