Results 1 to 10 of about 113,956 (308)

A binary biclustering algorithm based on the adjacency difference matrix for gene expression data analysis [PDF]

open access: goldBMC Bioinformatics, 2022
Biclustering algorithm is an effective tool for processing gene expression datasets. There are two kinds of data matrices, binary data and non-binary data, which are processed by biclustering method.
He-Ming Chu   +5 more
doaj   +2 more sources

Relationship between adjacency and distance matrix of graph of diameter two

open access: diamondIndonesian Journal of Combinatorics, 2021
The relationship among every pair of vertices in a graph can be represented as a matrix, such as in adjacency matrix and distance matrix. Both adjacency and distance matrices have the same property.
Siti L. Chasanah   +3 more
doaj   +3 more sources

On the Displacement of Eigenvalues When Removing a Twin Vertex [PDF]

open access: yesDiscussiones Mathematicae Graph Theory, 2020
Twin vertices of a graph have the same open neighbourhood. If they are not adjacent, then they are called duplicates and contribute the eigenvalue zero to the adjacency matrix.
Briffa Johann A., Sciriha Irene
doaj   +3 more sources

Unified Spectral Bounds on the Chromatic Number

open access: yesDiscussiones Mathematicae Graph Theory, 2015
One of the best known results in spectral graph theory is the following lower bound on the chromatic number due to Alan Hoffman, where μ1 and μn are respectively the maximum and minimum eigenvalues of the adjacency matrix: χ ≥ 1+μ1/−μn.
Elphick Clive, Wocjan Pawel
doaj   +3 more sources

Rank-GCN for Robust Action Recognition

open access: yesIEEE Access, 2022
We present a robust skeleton-based action recognition method with graph convolutional network (GCN) that uses the new adjacency matrix, called Rank-GCN. In Rank-GCN, the biggest change from previous approaches is how the adjacency matrix is generated to ...
Haetsal Lee   +3 more
doaj   +1 more source

The gamma-Signless Laplacian Adjacency Matrix of Mixed Graphs

open access: yesTheory and Applications of Graphs, 2023
The α-Hermitian adjacency matrix Hα of a mixed graph X has been recently introduced. It is a generalization of the adjacency matrix of unoriented graphs. In this paper, we consider a special case of the complex number α.
Omar Alomari   +2 more
doaj   +1 more source

Anti-Adjacency Matrices of Certain Graphs Derived from Some Graph Operations

open access: yesRatio Mathematica, 2023
If we go through the literature, one can find many matrices that are derived for a given simple graph. The one among them is the anti-adjacency matrix which is given as follows; The anti-adjacency matrix of a simple undirected graph $G$ with vertex set   
Manju V N, Athul T B, Suresh Singh G
doaj   +1 more source

Some New Bounds for α-Adjacency Energy of Graphs

open access: yesMathematics, 2023
Let G be a graph with the adjacency matrix A(G), and let D(G) be the diagonal matrix of the degrees of G. Nikiforov first defined the matrix Aα(G) as Aα(G)=αD(G)+(1−α)A(G), 0≤α≤1, which shed new light on A(G) and Q(G)=D(G)+A(G), and yielded some ...
Haixia Zhang, Zhuolin Zhang
doaj   +1 more source

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