Arithmetic progressions, quasi progressions, and Gallai-Ramsey colorings
Arithmetic progressions, quasi progressions, and Gallai-Ramsey colorings
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DOI:
10.1016/j.jcta.2022.105672
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发表时间:
2023-01
期刊:
影响因子:
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通讯作者:
Y. Mao;K. Ozeki;Aaron Robertson;Zhao Wang
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文献类型:
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作者:
Y. Mao;K. Ozeki;Aaron Robertson;Zhao Wang
We investigate several functions related to the r-color off-diagonal van der Waerden numbers w (m 1,…, m r), where w (m 1,…, m r) is the minimal integer n such that every r-coloring of {1, 2,…, n} admits an m i-term arithmetic progression with all terms of color i for some i∈{1, 2,…, r}. We start by giving a new lower bound for these related numbers. Next, the exact values and bounds of numbers related to quasi-progressions and mixed quasi-progression-van der Waerden numbers are given. Then, inspired by the success of graph Gallai-Ramsey theory and rainbow arithmetic progressions, we introduce the concept of Gallai-van der Waerden numbers, and obtain some exact values and bounds for these numbers, some of which are derived by the probabilistic method and the Lovász Local Lemma.