Keresés
28 találatból megjelenítve: 1-10
Cím: A Bijection for the Boolean Numbers of Ferrers Graphs
Szerző:
Dátum: 2022
Feltöltve: 2022-04-13
(Springer Japan, 2022)
In this note we prove a new characterization of the derangement sets of Ferrers graphs and present a bijection between the derangement sets and Fλ-Callan sequences. In particular, this connection reveals that the boolean ...
Cím: On Higher Order Generalized Geometric Polynomials with Shifted Parameters
Szerző: ; ;
Dátum: 2022
Feltöltve: 2023-02-20
(2022)
We study a special class of higher order generalized geometric polynomials. Based on our combinatorial interpretation of labeled barred preferential arrangements, we prove several recursions. We also study the polynomials ...
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: 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: 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: 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: 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: Global coarse-grained mesoscale eddy statistics based on integrated kinetic energy and enstrophy correlations
Szerző: ; ; ;
Dátum: 2022
Feltöltve: 2023-02-14
(2022)
"Recently, introduced the concept of a "vortex proxy" based on an observation of strong correlations between integrated kinetic energy and integrated enstrophy over a large enough surface area. When mesoscale vortices are ...
Cím: Set partitions and non-crossing partitions with l-neighbors and l-isolated elements
Szerző: ; ;
Dátum: 2022
Feltöltve: 2023-02-14
(2022)
In this paper we introduce the notion of an -neighbor element of set partitions, that is, an element a in a block that contains +1 consecutive elements, among which is a . Elements that are not -neighbors are called -isolated ...
Cím: Irreproducibility in searches of scientific literature: A comparative analysis
Szerző: ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Dátum: 2021
Feltöltve: 2023-02-16
(2021)
Abstract Repeatability is the cornerstone of science, and it is particularly important for systematic reviews. However, little is known on how researchers? choice of database, and search platform influence the repeatability ...