Results 1 to 10 of about 244 (170)

Generalization of (Q,L)-Fuzzy Soft Subhemirings of a Hemiring

open access: yesAdvances in Fuzzy Systems, 2022
This paper investigates the properties and results of (Q,L)-fuzzy soft subhemirings ((Q,L)-FSSHR) of a hemiring R. The motivation behind this study is to utilize the concept of L-fuzzy soft set of a hemiring and to derive a few specific outcomes on (Q, L)
K. Geetha   +5 more
doaj   +3 more sources

Some sufficient conditions on hamilton graphs with toughness [PDF]

open access: yesFrontiers in Computational Neuroscience, 2022
Let G be a graph, and the number of components of G is denoted by c(G). Let t be a positive real number. A connected graph G is t-tough if tc(G − S) ≤ |S| for every vertex cut S of V(G). The toughness of G is the largest value of t for which G is t-tough,
Gaixiang Cai   +4 more
doaj   +2 more sources

A recursive condition for the symmetric nonnegative inverse eigenvalue problem

open access: yesRevista Integración, 2017
In this paper we present a sufficient ondition and a necessary condition for Symmetri Nonnegative Inverse Eigenvalue Problem. This condition is independent of the existing realizability criteria.
Elvis Ronald Valero   +2 more
doaj   +3 more sources

α‐Completely Regular and Almost α‐Completely Regular Spaces

open access: yesMathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
This work is aimed at studying some of the characterizations of α‐completely regular and almost α‐completely regular spaces through the new concept of α‐zero sets and α‐continuous functions. 2010 Mathematics Subject Classification: primary 05C38, 15A15; Secondary 05A15, 15A18.
A.A. Azzam, A.A. Nasef, Cenap Özel
wiley   +1 more source

On Singular Signed Graphs with Nullspace Spanned by a Full Vector: Signed Nut Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2022
A signed graph has edge weights drawn from the set {+1, −1}, and is sign-balanced if it is equivalent to an unsigned graph under the operation of sign switching; otherwise it is sign-unbalanced.
Bašić Nino   +3 more
doaj   +1 more source

Reproducibility of serum testing for environmental allergen‐specific IgE in dogs in Europe

open access: yesVeterinary Dermatology, Volume 32, Issue 3, Page 251-e67, June 2021., 2021
Background – Serum testing for allergen‐specific immunoglobulin (Ig)E is commonly employed to identify allergens used for allergen‐specific immunotherapy in dogs, yet the reliability of results has been a matter of debate. Objective – The aim of this study was to evaluate the reproducibility of serum tests for environmental allergen‐specific IgE in ...
Katja N. Baumann   +4 more
wiley   +1 more source

The Number of P-Vertices of Singular Acyclic Matrices: An Inverse Problem

open access: yesDiscussiones Mathematicae Graph Theory, 2020
Let A be a real symmetric matrix. If after we delete a row and a column of the same index, the nullity increases by one, we call that index a P-vertex of A.
Du Zhibin, da Fonseca Carlos M.
doaj   +1 more source

On the spectral properties of real antitridiagonal Hankel matrices

open access: yesSpecial Matrices, 2022
In this article, we express the eigenvalues of real antitridiagonal Hankel matrices as the zeros of given rational functions. We still derive eigenvectors for these structured matrices at the expense of prescribed eigenvalues.
Lita da Silva João
doaj   +1 more source

The smallest singular value of certain Toeplitz-related parametric triangular matrices

open access: yesSpecial Matrices, 2021
Let L be the infinite lower triangular Toeplitz matrix with first column (µ, a1, a2, ..., ap, a1, ..., ap, ...)T and let D be the infinite diagonal matrix whose entries are 1, 2, 3, . . . Let A := L + D be the sum of these two matrices.
Solary Maryam Shams   +2 more
doaj   +1 more source

The effect of removing a 2-downer edge or a cut 2-downer edge triangle for an eigenvalue

open access: yesSpecial Matrices, 2023
Edges in the graph associated with a square matrix over a field may be classified as to how their removal affects the multiplicity of an identified eigenvalue.
Toyonaga Kenji
doaj   +1 more source

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