Abstract
A chordal ring, denoted by CR( N, d), is a graph G = ( V, E) with V = {0, 1,…, N − 1} and E = {(u, v) ¦[v − u] N = 1 or d} , where 2 ⩽ N ⩽ N 2 and [ r] N denotes r modulo N. We show that for 2 ⩽ d < N 2 , CR(N, d) has four independent spanning trees rooted at the same vertex.
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