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Pendant 3-tree-connectivity of augmented cubes

Published: 27 May 2024 Publication History

Abstract

The Steiner tree problem in graphs is widely studied because of its usefulness in network design and circuit layout. In this context, given a set of vertices S(|S|2,) a tree that connects all vertices in S is called an S-Steiner tree. This helps to measure how well a network G can connect any set of S vertices together. In an S-Steiner tree, if each vertex in S has only one connection, it is called a pendant S-Steiner tree. Two pendant S-Steiner trees, T and T, are internally disjoint if E(T)E(T)= and V(T)V(T)=S. The local pendant tree-connectivity, denoted as τG(S), represents the maximum number of internally disjoint pendant S-Steiner trees in graph G. For an integer k with 2kn, where n is the number of vertices, the pendant k-tree-connectivity, denoted as τk(G), is defined as τk(G)=min{τG(S):SV(G),|S|=k}. This paper focuses on studying the pendant 3-tree-connectivity of augmented cubes, which are modified versions of hypercubes designed to enhance connectivity and reduce diameter. This research demonstrates that the pendant 3-tree-connectivity of augmented cubes, denoted as τ3(AQn) is 2n-3. This result matches the upper bound of τ3(G) provided by Hager, specifically for the augmented cube graph AQn.

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            Published In

            cover image The Journal of Supercomputing
            The Journal of Supercomputing  Volume 80, Issue 13
            Sep 2024
            1622 pages

            Publisher

            Kluwer Academic Publishers

            United States

            Publication History

            Published: 27 May 2024
            Accepted: 27 April 2024

            Author Tags

            1. Steiner trees
            2. Pendant k-tree-connectivity
            3. Hypercube
            4. Augmented cube

            Author Tags

            1. 05C40
            2. 05C70
            3. 68R10

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            • Department of Science and Technology, New Delhi, India

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