Results 41 to 50 of about 152 (126)
Restricted lonesum matrices [PDF]
, 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 rich literature in number theory.
Bényi, Beáta
core +1 more source
Determinant of binary circulant matrices
Special Matrices, 2019 This article gives a closed-form expression for the determinant of binary circulant matrices.
Hariprasad M.
doaj +1 more source
Stack-sorting for Coxeter groups [PDF]
, 2022 Given an essential semilattice congruence \(\equiv\) on the left weak order of a \linebreak Coxeter group \(W\), we define the Coxeter stack-sorting operator \({\bf S}_\equiv:W\to W\) by \({{\bf S}_\equiv(w)=w\big(\pi_\downarrow^\equiv(w)\big)^{-1 ...
Defant, Colin
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Pattern Avoiding Permutations Enumerated by Inversions [PDF]
Discrete Mathematics & Theoretical Computer SciencePermutations are usually enumerated by size, but new results can be found by enumerating them by inversions instead, in which case one must restrict one's attention to indecomposable permutations.
Atli Fannar Franklín
doaj +1 more source
Long increasing subsequences and non-algebraicity [PDF]
Discrete Mathematics & Theoretical Computer ScienceWe use a recent result of Alin Bostan to prove that the generating functions of two infinite sequences of permutation classes are not algebraic.
Miklos Bona
doaj +1 more source
Some collapsibility results for n-dimensional contingency tables [PDF]
Collapsibility, Conditional independence, Contingency table, Log-linear model, Möbius inversion, Simpson’s paradox, Strict collapsibility, Primary 62H17, Secondary 62E99, Secondary 05A05,
P. Vellaisamy, V. Vijay
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A positional statistic for 1324-avoiding permutations [PDF]
Discrete Mathematics & Theoretical Computer ScienceWe consider the class $S_n(1324)$ of permutations of size $n$ that avoid the pattern 1324 and examine the subset $S_n^{a\prec n}(1324)$ of elements for which $a\prec n\prec [a-1]$, $a\ge 1$.
Juan B. Gil +2 more
doaj +1 more source
Generalized Stirling permutations and forests: Higher-order Eulerian and Ward numbers [PDF]
, 2014 20 pags.; 4 figs.; Mathematics Subject Classifications: 05A05, 05A15, 05C30We define a new family of generalized Stirling permutations that can be interpreted in terms of ordered trees and forests.
Sánchez Villaseñor, Eduardo Jesús +8 more
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Use of a Cytobrush for Sampling the Ear Canal of Dogs With Otitis Externa
Veterinary Dermatology, Volume 37, Issue 2, Page 227-235, April 2026.Cytological examination of the ear canal is essential for evaluating dogs with otitis externa (OE). The conventional sampling method uses a swab. However, the cytobrush (gynaecological cervical brush), already used for cytological collection from other anatomical sites, has not been adequately investigated for this purpose in dogs with OE.
Nicoly Radaeli Atanasio +3 more
wiley +1 more source
Veterinary Dermatology, Volume 27, Issue 5, Page 391-e98, October 2016., 2016 Background– Pseudomonas aeruginosa (PA) may cause suppurative otitis externa with severe inflammation and ulceration in dogs. Multidrug resistance is commonly reported for this organism, creating a difficult therapeutic challenge. Objective– The aim of this study was to evaluate the in vitro antimicrobial activity of a gel containing 0.5 µg/mL of ...
Giovanni Ghibaudo +6 more
wiley +1 more source