Results 41 to 50 of about 261,453 (169)

On α-adjacency energy of graphs and Zagreb index

AKCE International Journal of Graphs and Combinatorics, 2021
Let A(G) be the adjacency matrix and D(G) be the diagonal matrix of the vertex degrees of a simple connected graph G. Nikiforov defined the matrix of the convex combinations of D(G) and A(G) as for If are the eigenvalues of (which we call α-adjacency ...
S. Pirzada, Bilal A. Rather, Hilal A. Ganie, Rezwan ul Shaban   +3 more
doaj   +1 more source

Ideal convergence generated by double summability methods

Demonstratio Mathematica, 2016
The main result of this note is that if I is an ideal generated by a regular double summability matrix summability method T that is the product of two nonnegative regular matrix methods for single sequences, then I-statistical convergence and convergence
Connor Jeff
doaj   +1 more source

On the Nomura algebras of formally self-dual association schemes of class 2 [PDF]

Transactions on Combinatorics, 2013
‎‎In this paper‎, ‎the type-II matrices on (negative) Latin square graphs are considered and it is proved that‎, ‎under certain conditions‎, ‎the Nomura algebras of such type-II matrices are trivial‎.
Amir Rahnamai Barghi, Azam Hosseini
doaj  

Generation of strongly regular graphs from quaternary complex Hadamard matrices

Ceylon Journal of Science, 2018
A strongly regular graph with parameters (v, k, μ, λ) is a regular graph G with v vertices and k degree in which every two adjacent vertices have λ common neighbors and every two non-adjacent vertices have μ common neighbors. In this paper, we propose an
W. V. Nishadi, K. D. E. Dhananjaya, A. A. I. Perera, P. Gunathilake   +3 more
doaj   +1 more source

Density matrix minimization with ${\ell}_1$ regularization [PDF]

Communications in Mathematical Sciences, 2015
25 pages, 11 ...
Lai, Rongjie, Lu, Jianfeng, Osher, Stanley   +2 more
openaire   +2 more sources

On the Regularization in J-Matrix Methods

, 2008
We investigate the effects of the regularization procedure used in the J-Matrix method. We show that it influences the convergence, and propose an alternative regularization approach. We explicitly perform some model calculations to demonstrate the improvement.
Broeckhove, J., Vasilevsky, V., Arickx, F., Sytcheva, A.   +3 more
openaire   +3 more sources

Polynomials Counting Nowhere-Zero Chains Associated with Homomorphisms

Mathematics
A regular matroid M on a finite set E is represented by a totally unimodular matrix. The set of vectors from ZE orthogonal to rows of the matrix form a regular chain group N.
Martin Kochol
doaj   +1 more source

About canonical forms of regular matrix pencil

Karpatsʹkì Matematičnì Publìkacìï, 2012
The algorithm of local reduction of the regular matrix pencil to canonical form is constructed in the article.
Samusenko P.F.
doaj  

Eigenvalue computations for regular matrix Sturm-Liouville problems

Electronic Journal of Differential Equations, 1995
of regular self-adjoint Sturm-Liouville problems with matrix coefficients and separated boundary conditions.
H. I. Dwyer, A. Zettl
doaj  

Statistical convergence and uniqueness properties of regular matrix summability

Journal of Inequalities and Applications
This paper extends classical results on regular matrix summability to the framework of statistical convergence. By leveraging density-preserving mappings and constructing oscillating sequences with controlled density properties, we establish fundamental ...
Sami M. Hamid, Richard F. Patterson
doaj   +1 more source