Mixed restricted Stirling numbers

被引:4
作者
Barati, S. [1 ]
Benyi, B. [2 ]
Jafarzadeh, A. [1 ]
Yaqubi, D. [3 ]
机构
[1] Ferdowsi Univ Mashhad, Dept Pure Math, Mashhad, Razavi Khorasan, Iran
[2] Natl Univ Publ Serv, Fac Water Sci, Budapest, Hungary
[3] Univ Torbat E Jam, Fac Agr & Anim Sci, Torbat E Jam, Iran
关键词
multiplicative partition function; Stirling number of the second kind; mixed partition of a set;
D O I
10.1007/s10474-019-00915-8
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We investigate mixed partitions with extra condition on the sizes of the blocks. We give a general formula and the generating function. We consider in more details a special case, determining the generating functions, some recurrences and a connection to r-Stirling numbers. To obtain our results, we use pure combinatorial arguments, classical manipulations of generating functions and to derive the generating functions we apply the symbolic method.
引用
收藏
页码:159 / 172
页数:14
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