A note on rainbow saturation number of paths
A note on rainbow saturation number of paths
复制标题
关于彩虹饱和路径数的说明
DOI:
10.1016/j.amc.2020.125204
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发表时间:
2019-02
影响因子:
4
通讯作者:
Taoqiu Zhenyu
中科院分区:
文献类型:
--
作者:
Cao Shujuan;Ma Yuede;Taoqiu Zhenyu
For a fixed graph F and an integer t, the rainbow saturation number of F, denoted by s a t t (n, R (F)), is defined as the minimum number of edges in a t-edge-colored graph on n vertices which does not contain a rainbow copy of F, ie, a copy of F all of whose edges receive a different color, but the addition of any missing edge in any color from [t] creates such a rainbow copy. Barrus, Ferrara, Vardenbussche and Wenger prove that s a t t (n, R (P ℓ))≥ n− 1 for ℓ≥ 4 and s a t t (n, R (P ℓ))≤⌈ n ℓ− 1⌉·(ℓ− 1 2) for t≥(ℓ− 1 2), where P ℓ is a path with ℓ edges. In this short note, we improve the upper bounds and show that s a t t (n, R (P ℓ))≤⌈ n ℓ⌉·((ℓ− 2 2)+ 4) for ℓ≥ 5 and t≥ 2 ℓ− 5.
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