Equitable L(2, 1)-labelings of Sierpiński graphs

نویسندگان

  • Hong-Yong Fu
  • Dezheng Xie
چکیده

An L(2, 1)-labeling of a graph G is equitable if the number of elements in any two color classes differ by at most one. The equitable L(2, 1)-labeling number λe(G) of G is the smallest integer k such that G has an equitable L(2, 1)-labeling. Sierpiński graphs S(n, k) generalize the Tower of Hanoi graphs—the graph S(n, 3) is isomorphic to the graph of the Tower of Hanoi with n disks. In this paper, we show that for any n ≥ 2 and any k ≥ 2, λe(S(n, k)) = 2k.

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عنوان ژورنال:
  • Australasian J. Combinatorics

دوره 46  شماره 

صفحات  -

تاریخ انتشار 2010