The toughness t(G) of a noncomplete graph G is defined as t(G) = min{|S|/ω(G-S) | S(?) V(G)
ω(G-S) > 2}and the toughness of a complete graph is ∞
where ω(G- S) is
the number of connected components of G- S.The edge-toughness t′(G) of G is defined as t'(G) = min{(|X|)/(ω(G-X)-1) X is an edge-cut set of G}.In this paper
we determine the toughness of Kronecker product of a complete graph and a cycle
and supply formulae for the edge-toughness of Kronecker product of a complete graph and regular graphs.
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references
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