2-Adic valuations of Stirling numbers of the first kind
2-Adic valuations of Stirling numbers of the first kind
复制标题
第一类斯特林数的 2-Adic 估值
DOI:
10.1142/s1793042119501021
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发表时间:
2018-12
影响因子:
0.7
通讯作者:
Hong Shaofang
中科院分区:
文献类型:
--
作者:
Qiu Min;Hong Shaofang
Let [Formula: see text] and [Formula: see text] be positive integers. We denote by [Formula: see text] the 2-adic valuation of [Formula: see text]. The Stirling numbers of the first kind, denoted by [Formula: see text], count the number of permutations of [Formula: see text] elements with [Formula: see text] disjoint cycles. In recent years, Lengyel, Komatsu and Young, Leonetti and Sanna, and Adelberg made some progress on the study of the [Formula: see text]-adic valuations of [Formula: see text]. In this paper, by introducing the concept of [Formula: see text]th Stirling numbers of the first kind and providing a detailed 2-adic analysis, we show an explicit formula on the 2-adic valuation of [Formula: see text]. We also prove that [Formula: see text] holds for all integers [Formula: see text] between 1 and [Formula: see text]. As a corollary, we show that [Formula: see text] if [Formula: see text] is odd and [Formula: see text]. This confirms partially a conjecture of Lengyel raised in 2015. Furthermore, we show that if [Formula: see text], then [Formula: see text] and [Formula: see text], where [Formula: see text] stands for the [Formula: see text]th elementary symmetric functions of [Formula: see text]. The latter one supports the conjecture of Leonetti and Sanna suggested in 2017.
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影响因子:
0.9
作者:
Hong S.;Wang C.
通讯作者:
Wang C.
影响因子:
0.7
作者:
T. Komatsu;P. Young
通讯作者:
T. Komatsu;P. Young
DOI:
10.1090/s0002-9939-1990-1036984-4
发表时间:
1990-03
期刊:
--
影响因子:
--
作者:
D. M. Davis
通讯作者:
D. M. Davis
DOI:
10.4169/amer.math.monthly.119.10.862
发表时间:
2011-09
期刊:
The American Mathematical Monthly
影响因子:
--
作者:
Yong-Gao Chen;M. Tang
通讯作者:
Yong-Gao Chen;M. Tang
影响因子:
0.7
作者:
Wu Bing-Ling;Chen Yong-Gao
通讯作者:
Chen Yong-Gao