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The Conditional-(g, d, k)-Connectivity and Conditional-(g, d, k)-edge-Connectivity on the Hypercubes

Lin Cheng-Kuan, Ma Liang, Fan Jianxi, Hsu Lih-Hsing, Teng Yuan-Hsiang

Fundamenta Informaticae

2020

Vol. 173, nr 1

33--45

We propose two new measures of conditional connectivity to be the extension of Rg-connectivity and Rg-edge-connectivity. Let G be a connected graph. A set of vertices (edges) F is said to be a conditional (g, d, k)(-edge)-cut of G if (1) G – F is disconnected; (2) every vertex in G – F has at least g neighbors; (3) degG–F(p) + degG–F(q) ≥ 2g + k for every two distinct vertices p and q in G – F with d(p, q) ≤ d. The (g, d, k)-conditional(-edge)-connectivity, denoted by κg,d,k(λg,d,k), is the minimum cardinality of a conditional (g, d, k)(-edge)-cut. Based on these requirements, we obtain κ1,1,k, κ1,d,2, λ1,1,1 and λ1,d,2 for the hypercubes.