On the vertex-distinguishing proper edge coloring of composition of complete graph and star

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A proper k-edge coloring of a simple graph G is called k-vertex-distinguishing proper edge coloring (k-VDPEC) if for any two distinct vertices u and v of G, the set of colors assigned to edges incident to u differs from the set of colors assigned to edges incident to v. The minimum number of colors required for a vertex-distinguishing proper edge coloring of G, denoted by χs′(G), is called the vertex-distinguishing proper edge chromatic number. For p⩾2 and q⩾4, we will obtain vertex-distinguishing proper edge chromatic number of composition of complete graph Kp with order p and star Sq with order q, which is pq.