Keresés
29 találatból megjelenítve: 11-20
Cím: Generalized Ordered Set Partitions
Szerző: ; ;
Dátum: 2020
Feltöltve: 2023-02-16
(2020)
In this paper, we consider ordered set partitions obtained by imposing conditions on the size of the lists, and such that the first r elements are in distinct blocks, respectively. We introduce a generalization of the Lah ...
Cím: On the Combinatorics of Symmetrized Poly-Bernoulli Bumbers
Szerző: ;
Dátum: 2021
Feltöltve: 2023-02-16
(2021)
In this paper we introduce three combinatorial models for symmetrized poly- Bernoulli numbers. Based on our models we derive generalizations of some identities for poly-Bernoulli numbers. Finally, we set open questions and ...
Cím: Restricted r-Stirling Numbers and Their Combinatorial Applications
Szerző: ; ; ;
Dátum: 2019
Feltöltve: 2023-02-20
(2019)
We study set partitions with r distinguished elements and block sizes found in an arbitrary index set S . The enumeration of these ( S, r )-partitions leads to the introduc- tion of ( S, r )-Stirling numbers, an extremely ...
Cím: Some applications of S-restricted set partitions
Szerző: ;
Dátum: 2019
Feltöltve: 2023-02-20
(2019)
In the paper, the authors present several new relations and applications for the combinatorialsequence that counts the possible partitions of a finite set with the restriction that the size ofeach block is contained in a ...
Cím: Mixed Restricted Stirling Numbers
Szerző: ; ; ;
Dátum: 2019
Feltöltve: 2023-02-20
(2019)
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 ...
Cím: Restricted Lonesum Matrices
Szerző:
Dátum: 2018
Feltöltve: 2023-02-20
(2018)
"Lonesum matrices are matrices that are uniquely reconstructible from their row and column sum vectors. These matrices are enumerated by the poly-Bernoulli numbers"," a sequence related to the multiple zeta values with a ...
Cím: Mammal Extinction Facilitated Biome Shift and Human Population Change During the Last Glacial Termination in East-Central Europe
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Dátum: 2022
Feltöltve: 2023-02-14
(2022)
"The study of local extinction times, together with the associated environmental and human population changes in the last glacial termination, provides insights into the causes of mega- and microfauna extinctions. In ...
Cím: Toppling on Permutations with an Extra Chip
Szerző: ;
Dátum: 2021
Feltöltve: 2023-02-16
(2021)
The study of toppling on permutations with an extra labeled chip was initiated by the first author with D. Hathcock and P. Tetali (arXiv:2010.11236), where the extra chip was added in the middle. We extend this to all ...
Cím: Combinatorial Proof of an Identity on Genocchi Numbers
Szerző: ;
Dátum: 2021
Feltöltve: 2023-02-20
(2021)
In this note we present a combinatorial proof of an identity involving poly-Bernoullinumbers and Genocchi numbers. We introduce combinatorial objects calledm-barredCallan sequences and use them to show that the identity ...
Cím: Weak Ascent Sequences and Related Combinatorial Structures
Szerző: ; ;
Dátum: 2023
Feltöltve: 2023-02-14
(2023)
In this paper we introduce weak ascent sequences, a class of number sequences that properly contains ascent sequences. We show how these sequences uniquely encode each of the following objects: permutations avoiding a ...