Results 31 to 40 of about 108,510 (269)
Permutations by Interchanges [PDF]
The Computer Journal, 1963 Methods for obtaining all possible permutations of a number of objects, in which each permutation differs from its predecessor only by the interchange of two of the objects, are discussed. Details of two programs which produce these permutations are given, one allowing a specified position to be filled by each of the objects in a predetermined order ...
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Some new facts about group đ˘ generated by the family of convergent permutations
Open Mathematics, 2017 The aim of this paper is to present some new and essential facts about group đ˘ generated by the family of convergent permutations, i.e. the permutations on â preserving the convergence of series of real terms.
WituĹa Roman +2 more
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Profiles of Permutations [PDF]
The Electronic Journal of Combinatorics, 2009 This paper develops an analogy between the cycle structure of, on the one hand, random permutations with cycle lengths restricted to lie in an infinite set $S$ with asymptotic density $\sigma$ and, on the other hand, permutations selected according to the Ewens distribution with parameter $\sigma$.
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Permutation Statistics of Indexed Permutations
European Journal of Combinatorics, 1994 The definitions of descent, exceedance, major index, inversion index and Denert's statistic for the elements of the symmetric group \({\mathcal S}_ d\) are generalized to indexed permutations, i.e. the elements of the group \(S^ n_ d:=\mathbb{Z}_ n\wr{\mathcal S}_ d\), where \(\wr\) is the wreath product with respect to usual action of \({\mathcal S}_ ...
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Permutation Reconstruction [PDF]
The Electronic Journal of Combinatorics, 2006 In this paper, we consider the problem of permutation reconstruction. This problem is an analogue of graph reconstruction, a famous question in graph theory. In the case of permutations, the problem can be stated as follows: In all possible ways, delete $k$ entries of the permutation $p=p_1p_2p_3...p_n$ and renumber accordingly, creating $n \choose k$
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Forum of Mathematics, Sigma, 2023 We introduce a new class of permutations, called web permutations. Using these permutations, we provide a combinatorial interpretation for entries of the transition matrix between the Specht and $\operatorname {SL}_2$ -web bases of the irreducible
Byung-Hak Hwang +2 more
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Covering n-Permutations with (n+1)-Permutations [PDF]
The Electronic Journal of Combinatorics, 2013 Let $S_n$ be the set of all permutations on $[n]:=\{1,2,\ldots,n\}$. We denote by $\kappa_n$ the smallest cardinality of a subset ${\cal A}$ of $S_{n+1}$ that "covers" $S_n$, in the sense that each $\pi\in S_n$ may be found as an order-isomorphic subsequence of some $\pi'$ in ${\cal A}$. Â What are general upper bounds on $\kappa_n$?
Taylor F. Allison +3 more
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Health Literacy, SelfâEfficacy and Knowledge of Sickle Cell Disease Among Caregivers
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Sickle cell disease (SCD) is a hereditary blood disorder in which abnormal haemoglobin leads to severe anaemia, painful crises and organ failure. Caregiversâ health literacy (HL) â their ability to assess, understand and apply information, and interact with healthcare professionals â is crucial for managing children with SCD, yet ...
Melanie Bruinooge +6 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Leukemia is the most common childhood cancer in Mexico, and acute lymphoblastic leukemia (ALL) is the most frequent subtype. Exposure to high concentrations of benzene has been associated with ALL incidence, particularly in urban areas. This study evaluated the relationship between distance to benzene emission sources and the number
Orlando Rivera Zurita +5 more
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Parse Journal, 2023 The greedy and unstoppable bulldozer of runaway globalisation has led to unprecedented economic growth in the world since the 1990s, but at a cost. Local realities, practices and knowledges are being smothered, and ecosystems worldwide are becoming more ...
Thomas Hylland Eriksen
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