TY - JOUR

T1 - {2, 3} -Extraconnectivities of hypercube-like networks

AU - Chang, Nai Wen

AU - Hsieh, Sun Yuan

PY - 2013/8

Y1 - 2013/8

N2 - A subset of vertices X is said to be a cutset if G-X is not connected. A cutset X is called an Rg-cutset if every component of G-X has at least g+1 vertices. If G has at least one Rg-cutset, the g-extraconnectivity of G is then defined as the minimum cardinality over all Rg-cutsets of G. In this paper, we first show that the 2-extraconnectivity of an n-dimensional hypercube-like network is 3n-5 for n≥5. This improves on the previously best known result, which showed that the 2-extraconnectivity of an n-dimensional hypercube-like network is 3n-5 for n≥8. We further demonstrate that the 3-extraconnectivity of an n-dimensional hypercube-like network is 4n-9 for n≥6. Based on the above results, the 2-extraconnectivity and 3-extraconnectivity of several interconnection networks, including hypercubes, twisted cubes, crossed cubes, Möbius cubes, locally twisted cubes, generalized twisted cubes, recursive circulants, and Mcubes, can be determined efficiently.

AB - A subset of vertices X is said to be a cutset if G-X is not connected. A cutset X is called an Rg-cutset if every component of G-X has at least g+1 vertices. If G has at least one Rg-cutset, the g-extraconnectivity of G is then defined as the minimum cardinality over all Rg-cutsets of G. In this paper, we first show that the 2-extraconnectivity of an n-dimensional hypercube-like network is 3n-5 for n≥5. This improves on the previously best known result, which showed that the 2-extraconnectivity of an n-dimensional hypercube-like network is 3n-5 for n≥8. We further demonstrate that the 3-extraconnectivity of an n-dimensional hypercube-like network is 4n-9 for n≥6. Based on the above results, the 2-extraconnectivity and 3-extraconnectivity of several interconnection networks, including hypercubes, twisted cubes, crossed cubes, Möbius cubes, locally twisted cubes, generalized twisted cubes, recursive circulants, and Mcubes, can be determined efficiently.

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U2 - 10.1016/j.jcss.2013.01.013

DO - 10.1016/j.jcss.2013.01.013

M3 - Article

AN - SCOPUS:84875232028

SN - 0022-0000

VL - 79

SP - 669

EP - 688

JO - Journal of Computer and System Sciences

JF - Journal of Computer and System Sciences

IS - 5

ER -