The game Grundy indices of graphs

Wenchao Zhang and Xuding Zhu ()
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Wenchao Zhang: Zhejiang Normal University
Xuding Zhu: Zhejiang Normal University

Journal of Combinatorial Optimization, 2015, vol. 30, issue 3, No 12, 596-611

Abstract: Abstract Given a graph $$G=(V,E)$$ G = ( V , E ) , Alice and Bob, alternate their turns in choosing uncoloured edges to be coloured. Whenever an uncoloured edge is chosen, it is coloured by the least positive integer not used by any of its coloured neighbours. Alice’s goal is to minimize the total number of colours used in the game, and Bob’s goal is to maximize it. The game Grundy index of $$G$$ G is the number of colours used in the game when both players use optimal strategies. It is proved in this paper that the game Grundy index is at most $$\Delta +1$$ Δ + 1 for a forest with maximum degree $$\Delta \ge 5$$ Δ ≥ 5 , at most $$\Delta +4$$ Δ + 4 for a partial 2-tree with $$\Delta \ge 11$$ Δ ≥ 11 and at most $$\Delta +3$$ Δ + 3 for an outerplanar graph with $$\Delta \ge 14$$ Δ ≥ 14 .

Keywords: Game Grundy index; Forest; Partial 2-tree; Outerplanar graph (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1007/s10878-013-9657-1

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