Results 71 to 80 of about 889 (120)

Finite-dimensional Zinbiel algebras and combinatorial structures

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2022
In this paper, we study the link between finite-dimensional Zinbiel algebras and combinatorial structures or (pseudo)digraphs determining which configurations are associated with those algebras.
Ceballos Manuel   +2 more
doaj   +1 more source

Complex of abstract cubes and median problem [PDF]

open access: yesComputer Science Journal of Moldova, 2011
In this paper a special complex $\mathcal{K}^{n}$ of abstract cubes [2, 3], which contains only $n$-dimensional cubes is examined. The border of this complex is an abstract $(n-1)$-dimensional sphere.
Sergiu Cataranciuc, Petru Soltan
doaj  

Optimizing compatible sets in wireless networks through integer programming

open access: yesEURO Journal on Computational Optimization, 2014
In wireless networks, the notion of compatible set refers to a set of radio links that can be simultaneously active with a tolerable interference. Finding a compatible set with maximum weighted revenue from the parallel transmissions is an important ...
Yuan Li   +3 more
doaj   +1 more source

Eccentricity of Networks with Structural Constraints

open access: yesDiscussiones Mathematicae Graph Theory, 2020
The eccentricity of a node v in a network is the maximum distance from v to any other node. In social networks, the reciprocal of eccentricity is used as a measure of the importance of a node within a network.
Krnc Matjaž   +3 more
doaj   +1 more source

Measuring Generalized Preferential Attachment in Dynamic Social Networks

open access: yes, 2005
The mechanism of preferential attachment underpins most recent social network formation models. Yet few authors attempt to check or quantify assumptions on this mechanism.
Roth, Camille
core   +4 more sources

Quartet consistency count method for reconstructing phylogenetic trees

open access: yes, 2006
Among the distance based algorithms in phylogenetic tree reconstruction, the neighbor-joining algorithm has been a widely used and effective method. We propose a new algorithm which counts the number of consistent quartets for cherry picking with tie ...
Cho, Jin-Hwan   +2 more
core  

A $4/3$ Approximation for $2$-Vertex-Connectivity [PDF]

open access: yesTheoretiCS
The 2-Vertex-Connected Spanning Subgraph problem (2VCSS) is among the most basic NP-hard (Survivable) Network Design problems: we are given an (unweighted) undirected graph $G$.
Miguel Bosch-Calvo   +2 more
doaj   +1 more source

Caterpillars Have Antimagic Orientations

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2018
An antimagic labeling of a directed graph D with m arcs is a bijection from the set of arcs of D to {1, …, m} such that all oriented vertex sums of vertices in D are pairwise distinct, where the oriented vertex sum of a vertex u is the sum of labels of ...
Lozano Antoni
doaj   +1 more source

Revisiting structure graphs: Applications to CBC-MAC and EMAC

open access: yesJournal of Mathematical Cryptology, 2016
In [2], Bellare, Pietrzak and Rogaway proved an O⁢(ℓ⁢q2/2n)${O(\ell q^{2}/2^{n})}$ bound for the PRF (pseudorandom function) security of the CBC-MAC based on an n-bit random permutation Π, provided ...
Jha Ashwin, Nandi Mridul
doaj   +1 more source

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