Results 21 to 30 of about 19,171 (202)

The inclusion and exclusion principle in view of number theory

open access: yesRatio Mathematica, 2019
The inclusion and exclusion (connection and disconnection) principle is mainly known from combinatorics in solving the combinatorial problem of calculating all permutations of a finite set or other combinatorial problems.
Viliam Ďuriš, Tomáš Lengyelfalusy
doaj   +1 more source

Network conduciveness with application to the graph-coloring and independent-set optimization transitions. [PDF]

open access: yesPLoS ONE, 2010
BACKGROUND: Given an undirected graph, we consider the two problems of combinatorial optimization, which ask that its chromatic and independence numbers be found.
Valmir C Barbosa
doaj   +1 more source

Genomic Analysis of SARS-CoV-2 Alpha, Beta and Delta Variants of Concern Uncovers Signatures of Neutral and Non-Neutral Evolution

open access: yesViruses, 2022
Due to the emergence of new variants of the SARS-CoV-2 coronavirus, the question of how the viral genomes evolved, leading to the formation of highly infectious strains, becomes particularly important. Three major emergent strains, Alpha, Beta and Delta,
Monika Klara Kurpas   +3 more
doaj   +1 more source

Tops as building blocks for G 2 manifolds

open access: yesJournal of High Energy Physics, 2017
A large number of examples of compact G 2 manifolds, relevant to supersymmetric compactifications of M-Theory to four dimensions, can be constructed by forming a twisted connected sum of two building blocks times a circle.
Andreas P. Braun
doaj   +1 more source

The coefficients of transitivity of the posets of MM-type being the highest supercritical poset

open access: yesНауковий вісник Ужгородського університету. Серія: Математика і інформатика, 2022
The representations of partially ordered sets (abbreviated as posets), introduced by L. A. Nazarova and A. V. Roiter (in matrix form) in 1972, play an important role in the modern representation theory. In his first paper on this topic M. M.
В. М. Бондаренко   +2 more
doaj   +1 more source

The Autism Palette: Combinations of Impairments Explain the Heterogeneity in ASD

open access: yesFrontiers in Psychiatry, 2020
Autism spectrum disorder (ASD) is a heterogeneous neuropsychiatric condition traditionally defined by core symptoms in social behavior, speech/communication, repetitive behavior, and restricted interests.
Ábel Fóthi   +3 more
doaj   +1 more source

Energy-Efficient Distributed Topology Control Algorithm for Low-Power IoT Communication Networks

open access: yesIEEE Access, 2016
Topology control is one of the significant research topics in traditional wireless networks. The primary purpose of topology control ensures the connectivity of wireless nodes participated in the network.
Gangman Yi, Jong Hyuk Park, Sangil Choi
doaj   +1 more source

The Estimating of the Number of Lattice Tilings of a Plane by a Given Area Centrosymmetrical Polyomino

open access: yesМоделирование и анализ информационных систем, 2015
We study a problem about the number of lattice plane tilings by the given area centrosymmetrical polyominoes. A polyomino is a connected plane geomatric figure formed by joiining a finite number of unit squares edge to edge.
A. V. Shutov, E. V. Kolomeykina
doaj   +1 more source

Quantitative invertibility of random matrices: a combinatorial perspective

open access: yesDiscrete Analysis, 2021
Quantitative invertibility of random matrices: a combinatorial perspective, Discrete Analysis 2021:10, 38 pp. This paper concerns the general and much studied question of how likely a large random real or complex square matrix is to be invertible, and ...
Vishesh Jain
doaj   +1 more source

A novel perturbation based compression complexity measure for networks

open access: yesHeliyon, 2019
Measuring complexity of brain networks in the form of integrated information is a leading approach towards building a fundamental theory of consciousness.
Mohit Virmani, Nithin Nagaraj
doaj   +1 more source

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