Mixed restricted Stirling numbers
| Autor: | Barati, Somaya, Bényi, Beáta, Jafarzadeh, Abbas, Yaqubi, Daniel |
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| Rok vydání: | 2018 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | In this note 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. Comment: 12 pages |
| Databáze: | arXiv |
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