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MixedGraphinFuzzy,Neutrosophic, and Plithogenic Graphs [PDF]

open access: yesNeutrosophic Sets and Systems
Graph theory examines networks consisting of nodes (vertices) and the connections (edges) between them. Mixed graphs, which combine both undirected and directed edges, provide a versatile framework for representing relationships with symmetric and ...
Florentin Smarandache, Takaaki Fujita
doaj   +1 more source

$\mathcal{B}$-Partitions, determinant and permanent of graphs [PDF]

open access: yesTransactions on Combinatorics, 2018
Let $G$ be a graph (directed or undirected) having $k$ number of blocks $B_1, B_2,\hdots,B_k$. A $\mathcal{B}$-partition of $G$ is a partition consists of $k$ vertex-disjoint subgraph $(\hat{B_1},\hat{B_1},\hdots,\hat{B_k})$ such that $\hat{B}_i$ is an ...
Ranveer Singh, Ravindra Bapat
doaj   +1 more source

On Representing Mixed-Integer Linear Programs by Graph Neural Networks [PDF]

open access: yesarXiv.org, 2022
While Mixed-integer linear programming (MILP) is NP-hard in general, practical MILP has received roughly 100--fold speedup in the past twenty years. Still, many classes of MILPs quickly become unsolvable as their sizes increase, motivating researchers to
Ziang Chen   +4 more
semanticscholar   +1 more source

On fixed-parameter tractability of the mixed domination problem for graphs with bounded tree-width [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2018
A mixed dominating set for a graph $G = (V,E)$ is a set $S\subseteq V \cup E$ such that every element $x \in (V \cup E) \backslash S$ is either adjacent or incident to an element of $S$. The mixed domination number of a graph $G$, denoted by $\gamma_m(G)$
M. Rajaati   +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

Hermitian-Randić matrix and Hermitian-Randić energy of mixed graphs

open access: yesJournal of Inequalities and Applications, 2017
Let M be a mixed graph and H ( M ) $H(M)$ be its Hermitian-adjacency matrix. If we add a Randić weight to every edge and arc in M, then we can get a new weighted Hermitian-adjacency matrix. What are the properties of this new matrix?
Yong Lu, Ligong Wang, Qiannan Zhou
doaj   +1 more source

Computing Fault-Tolerant Metric Dimension of Connected Graphs

open access: yesJournal of Mathematics, 2022
For a connected graph, the concept of metric dimension contributes an important role in computer networking and in the formation of chemical structures.
Uzma Ahmad   +3 more
doaj   +1 more source

Mixing colourings in 2K2-free graphs

open access: yesDiscrete Mathematics, 2022
4 pages, 2 ...
Carl Feghali, Owen Merkel
openaire   +2 more sources

Locally Differentially Private Heterogeneous Graph Aggregation with Utility Optimization

open access: yesEntropy, 2023
Graph data are widely collected and exploited by organizations, providing convenient services from policy formation and market decisions to medical care and social interactions.
Zichun Liu   +3 more
doaj   +1 more source

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