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16 papers · 1 filter
Zeros of linear combinations of Laguerre polynomials from different sequences
K Driver, K Jordaan
We study interlacing properties of the zeros of two types of linear combinations of Laguerre polynomials with different parameters, namely and $S_n=L_n^α+bL…
Convexity of the zeros of some orthogonal polynomials and related functions
K Jordaan, F Tookos
We study convexity properties of the zeros of some special functions that follow from the convexity theorem of Sturm. We prove results on the intervals of convexity for the zeros o…
Free joinings of C*-dynamical systems
Rocco Duvenhage
Joinings of C*-dynamical systems are defined in terms of free products of C*-algebras, as an analogue of joinings of classical dynamical systems. We then consider disjointness in t…
On the existence of shortest directed networks
Konrad J Swanepoel
A directed network connecting a set A to a set B is a digraph containing an a-b path for each a in A and b in B. Vertices in the directed network not in A or B are called Steiner p…
Group Invariant Entanglements in Generalized Tensor Products
Elemer E Rosinger
The group invariance of entanglement is obtained within a very general and simple setup of the latter, given by a recently introduced considerably extended concept of tensor produc…
Robustness of Highly Entangled Multi-Qubit States Under Decoherence
A. Borras, A. P. Majtey, A. R. Plastino +2
We investigate the decay of entanglement, due to decoherence, of multi-qubit systems that are initially prepared in highly (in some cases maximally) entangled states. We assume tha…