Conditions for Implicit-Degree Sum for Spanning Trees with Few Leaves in K1,4-Free Graphs Article Swipe
YOU?
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· 2023
· Open Access
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· DOI: https://doi.org/10.3390/math11244981
A graph with n vertices is called an n-graph. A spanning tree with at most k leaves is referred to as a spanning k-ended tree. Spanning k-ended trees are important in various fields such as network design, graph theory, and communication networks. They provide a structured way to connect all the nodes in a network while ensuring efficient communication and minimizing unnecessary connections. In addition, they serve as fundamental components for algorithms in routing, broadcasting, and spanning tree protocols. However, determining whether a connected graph has a spanning k-ended tree or not is NP-complete. Therefore, it is important to identify sufficient conditions for the existence of such trees. The implicit-degree proposed by Zhu, Li, and Deng is an important indicator for the Hamiltonian problem and the spanning k-ended tree problem. In this article, we provide two sufficient conditions for K1,4-free connected graphs to have spanning k-ended trees for k = 2, 3. We prove the following: Let G be a K1,4-free connected n-graph. For k = 2, 3, if the implicit-degree sum of any k + 1 independent vertices of G is at least n − k + 2, then G has a spanning k-ended tree. Moreover, we give two examples to show that the lower bounds n and n − 1 are the best possible.
Related Topics
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/math11244981
- OA Status
- gold
- Cited By
- 1
- References
- 17
- Related Works
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- OpenAlex ID
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Raw OpenAlex JSON
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https://openalex.org/W4389914601Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/math11244981Digital Object Identifier
- Title
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Conditions for Implicit-Degree Sum for Spanning Trees with Few Leaves in K1,4-Free GraphsWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
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2023-12-17Full publication date if available
- Authors
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Junqing Cai, Cheng‐Kuan Lin, Qiang Sun, Panpan WangList of authors in order
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https://doi.org/10.3390/math11244981Publisher landing page
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YesWhether a free full text is available
- OA status
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goldOpen access status per OpenAlex
- OA URL
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https://doi.org/10.3390/math11244981Direct OA link when available
- Concepts
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Spanning tree, Trémaux tree, Combinatorics, Connected dominating set, Minimum spanning tree, Minimum degree spanning tree, Mathematics, Discrete mathematics, Degree (music), Graph, Shortest-path tree, Connectivity, Kruskal's algorithm, Computer science, Line graph, Pathwidth, Physics, AcousticsTop concepts (fields/topics) attached by OpenAlex
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1Total citation count in OpenAlex
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2024: 1Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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