On a Problem of Erdös and Szekeres

On a Problem of Erdös and Szekeres
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论鄂尔多斯和塞克雷斯问题

DOI:
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发表时间:
1961
期刊:
Canadian mathematical bulletin
影响因子:
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通讯作者:
F. Atkinson
F. Atkinson
中科院分区:
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文献类型:
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作者:
F. Atkinson

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记为1 2其中最大值是在所有真实的θ上,下界是在所有正整数集合a1 ≤ a2 ≤. ≤ an上。关于f(n)的数量级的问题是由Erdös和Szekeres [1]提出的,与其他一些有趣的问题并列。写作g(n)= log f(n),显然g(n)是次可加的,在这个意义上g(m+n)≤ g(m)+ g(n),并且g(1)= log 2,使得g(n)≤ n log 2。
Write 1 2 where the maximum is over all real θ, and the lower bound is over all sets of positive integers a1 ≤ a2 ≤ … ≤ an. The problem of the order of magnitude of f(n) was posed by Erdös and Szekeres [1], side by side with a number of other interesting questions. Writing g(n) = log f(n), it is obvious that g(n) is sub-additive, in the sense that g(m+n) ≤ g(m) + g(n), and also that g(1) = log 2, so that g(n) ≤ n log 2.