Results 81 to 90 of about 34,890 (227)
Random Threshold Digraphs [PDF]
The Electronic Journal of Combinatorics, 2014 This paper introduces a notion of a random threshold directed graph, extending the work of Reilly and Scheinerman in the undirected case and closely related to random Ferrers digraphs.We begin by presenting the main definition: $D$ is a threshold digraph provided we can find a pair of weighting functions $f,g:V(D)\to\mathbb{R}$ such that for distinct ...
Reilly, Elizabeth +2 more
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Chordal Graphs, Even‐Hole‐Free Graphs and Sparse Obstructions to Bounded Treewidth
Journal of Graph Theory, Volume 110, Issue 3, Page 351-365, November 2025.ABSTRACT Even‐hole‐free graphs pose a central challenge in identifying hereditary classes of bounded treewidth. We investigate this matter by presenting and studying the following conjecture: for an integer t ≥ 4 and a graph H, every even‐hole‐free graph of large enough treewidth has an induced subgraph isomorphic to either K t or H, if (and only if) H
Sepehr Hajebi
wiley +1 more source
Communications in Combinatorics and Optimization, 2016 Let $D$ be a finite and simple digraph with vertex set $V(D)$. For a vertex $v\in V(D)$, the degree of $v$, denoted by $d(v)$, is defined as the minimum value of its out-degree $d^+(v)$ and its in-degree $d^-(v)$.
L. Volkmann
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Developing a Sustainability Index for Implementing Big Data Analytics in the Logistics Sector
Sustainable Development, Volume 33, Issue S1, Page 1271-1291, November 2025.ABSTRACT This study identifies Critical Success Factors (CSFs) for implementing Big Data Analytics (BDA) for sustainable logistics practices in the context of an emerging economy. Through a combination of literature review and experts' opinions, the study identifies 18 CSFs essential for the effective application of BDA in the logistics sector.
Anchal Gupta +2 more
wiley +1 more source
Strong subgraph 2-arc-connectivity and arc-strong connectivity of Cartesian product of digraphs [PDF]
, 2022 Yiling Dong, Gregory Gutin, Yuefang Sun
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A systematic approach for identifying drivers of critical safety and establishing their hierarchy
The Canadian Journal of Chemical Engineering, Volume 103, Issue 10, Page 4628-4646, October 2025.Abstract Learning from incidents is a crucial step in preventing and mitigating adverse events. Incident databases offer valuable insights for safety management improvements by cause and contributing factors. However, extracting meaningful information from incident investigation reports poses a significant challenge. This study introduces a data‐driven
Mohammad Zaid Kamil +2 more
wiley +1 more source
Local Out-Tournaments with Upset Tournament Strong Components I: Full and Equal {0,1}-Matrix Ranks [PDF]
, 2010 A digraph D is a local out-tournament if the outset of every vertex is a tournament. Here, we use local out-tournaments, whose strong components are upset tournaments, to explore the corresponding ranks of the adjacency matrices.
Derby, Jason M. +2 more
core +1 more source
Strengthening the directed Brooks' theorem for oriented graphs and consequences on digraph redicolouring [PDF]
, 2023 Lucas Picasarri‐Arrieta
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Number of Subgraphs and Their Converses in Tournaments and New Digraph Polynomials
Journal of Graph Theory, Volume 110, Issue 2, Page 127-131, October 2025.ABSTRACT An oriented graph D is converse invariant if, for any tournament T, the number of copies of D in T is equal to that of its converse − D. El Sahili and Ghazo Hanna [J. Graph Theory 102 (2023), 684‐701] showed that any oriented graph D with maximum degree at most 2 is converse invariant. They proposed a question: Can we characterize all converse
Jiangdong Ai +4 more
wiley +1 more source
International Journal of Applied Mathematics and Computer Science, 2018 In the last two decades, fractional calculus has become a subject of great interest in various areas of physics, biology, economics and other sciences. The idea of such a generalization was mentioned by Leibniz and L’Hospital.
Markowski Konrad Andrzej
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