Results 21 to 30 of about 180 (113)

Eccentricity energy change of complete multipartite graphs due to edge deletion

open access: yesSpecial Matrices, 2022
The eccentricity matrix ɛ(G) of a graph G is obtained from the distance matrix of G by retaining the largest distances in each row and each column, and leaving zeros in the remaining ones. The eccentricity energy of G is sum of the absolute values of the
Mahato Iswar, Kannan M. Rajesh
doaj   +1 more source

Strong Geodetic Problem in Networks

open access: yesDiscussiones Mathematicae Graph Theory, 2020
In order to model certain social network problems, the strong geodetic problem and its related invariant, the strong geodetic number, are introduced.
Manuel Paul   +4 more
doaj   +1 more source

Proximity, remoteness and maximum degree in graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2022
The average distance of a vertex $v$ of a connected graph $G$ is the arithmetic mean of the distances from $v$ to all other vertices of $G$. The proximity $\pi(G)$ and the remoteness $\rho(G)$ of $G$ are the minimum and the maximum of the average ...
Peter Dankelmann   +2 more
doaj   +1 more source

Inverse Problem on the Steiner Wiener Index

open access: yesDiscussiones Mathematicae Graph Theory, 2018
The Wiener index W(G) of a connected graph G, introduced by Wiener in 1947, is defined as W(G) =∑u,v∈V (G)dG(u, v), where dG(u, v) is the distance (the length a shortest path) between the vertices u and v in G. For S ⊆ V (G), the Steiner distance d(S) of
Li Xueliang, Mao Yaping, Gutman Ivan
doaj   +1 more source

A New Transport Distance and Its Associated Ricci Curvature of Hypergraphs

open access: yesAnalysis and Geometry in Metric Spaces, 2022
The coarse Ricci curvature of graphs introduced by Ollivier as well as its modification by Lin–Lu– Yau have been studied from various aspects. In this paper, we propose a new transport distance appropriate for hypergraphs and study a generalization of ...
Akamatsu Tomoya
doaj   +1 more source

Sharp bounds for partition dimension of generalized Möbius ladders

open access: yesOpen Mathematics, 2018
The concept of minimal resolving partition and resolving set plays a pivotal role in diverse areas such as robot navigation, networking, optimization, mastermind games and coin weighing.
Hussain Zafar   +4 more
doaj   +1 more source

A Survey on Packing Colorings

open access: yesDiscussiones Mathematicae Graph Theory, 2020
If S = (a1, a2, . . .) is a non-decreasing sequence of positive integers, then an S-packing coloring of a graph G is a partition of V (G) into sets X1, X2, . . .
Brešar Boštjan   +3 more
doaj   +1 more source

On the general position number of two classes of graphs

open access: yesOpen Mathematics, 2022
The general position problem is to find the cardinality of the largest vertex subset SS such that no triple of vertices of SS lies on a common geodesic.
Yao Yan, He Mengya, Ji Shengjin
doaj   +1 more source

A new monoid construction under crossed products proceedings of the international congress in honour of professor Hari M. Srivastava

open access: yes, 2013
In this paper we define a new monoid construction under crossed products for given monoids. We also present a generating set and a relator set for this product. Finally, we give the necessary and sufficient conditions for the regularity of it. MSC: 05C10,
Cangül, İ. N.   +3 more
core   +1 more source

Cramér-rao bounds for synchronization of rotations [PDF]

open access: yes, 2012
Synchronization of rotations is the problem of estimating a set of rotations Ri ∈ SO(n), i = 1... N based on noisy measurements of relative rotations RiR j.
Amit Singer   +7 more
core   +1 more source

Home - About - Disclaimer - Privacy