Results 21 to 30 of about 1,732,355 (284)

Resistance Distance and Kirchhoff Index of $Q$ -Double Join Graphs

open access: yesIEEE Access, 2019
Let Q(G) be the graph derived from G by inserting a new vertex into every edge of G and by connecting edges of these new vertices that are on adjacent edges of G, and Q-double join of G, G1 and G2 denoted by GQ v{G1, G2}, is the graph derived from Q(G ...
Weizhong Wang, Tingyan Ma, Jia-Bao Liu
doaj   +1 more source

Unification of sparse Bayesian learning algorithms for electromagnetic brain imaging with the majorization minimization framework

open access: yesNeuroImage, 2021
Methods for electro- or magnetoencephalography (EEG/MEG) based brain source imaging (BSI) using sparse Bayesian learning (SBL) have been demonstrated to achieve excellent performance in situations with low numbers of distinct active sources, such as ...
Ali Hashemi   +5 more
doaj   +1 more source

Inverse monoids and immersions of 2-complexes [PDF]

open access: yes, 2015
It is well known that under mild conditions on a connected topological space $\mathcal X$, connected covers of $\mathcal X$ may be classified via conjugacy classes of subgroups of the fundamental group of $\mathcal X$.
Hatcher A.   +8 more
core   +2 more sources

Factoring Formal Maps into Reversible or Involutive Factors [PDF]

open access: yes, 2013
An element $g$ of a group is called reversible if it is conjugate in the group to its inverse. An element is an involution if it is equal to its inverse.
O'Farrell, Anthony G., Zaitsev, Dmitri
core   +2 more sources

Trace inequalities for positive semidefinite matrices

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2017
Certain trace inequalities for positive definite matrices are generalized for positive semidefinite matrices using the notion of the group generalized inverse.
Choudhury Projesh Nath, Sivakumar K.C.
doaj   +1 more source

On the Non-Inverse Graph of a Group

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2022
Let (G, *) be a finite group and S = {u ∈ G|u ≠ u−1}, then the inverse graph is defined as a graph whose vertices coincide with G such that two distinct vertices u and v are adjacent if and only if either u * v ∈ S or v * u ∈ S.
Amreen Javeria, Naduvath Sudev
doaj   +1 more source

Advancing Structural Health Monitoring with Deep Belief Network-Based Classification

open access: yesMathematics
Structural health monitoring (SHM) plays a critical role in ensuring the safety and longevity of civil infrastructure by enabling the early detection of structural changes and supporting preventive maintenance strategies.
Álvaro Presno Vélez   +2 more
doaj   +1 more source

On the graph condition regarding the $F$-inverse cover problem [PDF]

open access: yes, 2015
In their paper titled "On $F$-inverse covers of inverse monoids", Auinger and Szendrei have shown that every finite inverse monoid has an $F$-inverse cover if and only if each finite graph admits a locally finite group variety with a certain property. We
Szakács, Nóra
core   +2 more sources

Classification and Prediction of Topological Insulators by Using the Density of States

open access: yesMathematics
In order to characterize topological insulators it is customary to use representations of the electronic structure, such as the band structure, where the energy of electrons is represented as a function of their momenta.
Alejandro Díaz-Nadales   +3 more
doaj   +1 more source

Theoretical and Computational Methods to Resistance Distances in Novel Graphs Operations

open access: yesIEEE Access, 2019
Motivated by the recent research on the computation of resistance distance, this paper aims to compute resistance distance in two classes of graphs, which are generated by three graphs.
Li Zhang, Jia-Bao Liu
doaj   +1 more source

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