نتایج جستجو برای: dowling

تعداد نتایج: 557  

Journal: :Discrete & Computational Geometry 1999
Richard Ehrenborg Margaret Readdy

We study complex hyperplane arrangements whose intersection lattices, known as the Dowling lattices, are a natural generalization of the partition lattice. We give a combinatorial description of the Dowling lattice via enriched partitions to obtain an explicit EL-labeling and then find a recursion for the flag h-vector in terms of weighted derivations. When the hyperplane arrangements are real ...

Journal: :J. Comb. Theory, Ser. A 2000
Richard Ehrenborg Margaret Readdy

We define the Dowling transform of a real frame arrangement and show how the characteristic polynomial changes under this transformation. As a special case, the Dowling transform sends the braid arrangement An to the Dowling arrangement. Using Zaslavsky's characterization of supersolvability of signed graphs, we show supersolvability of an arrangement is preserved under the Dowling transform. W...

Journal: :Mediterranean Journal of Mathematics 2021

Abstract The notions of r -Bell polynomials and their generalization, the -Dowling are due to Mező Cheon, Jung. Recently, Nyul Rácz defined -Lah polynomials, which close relatives polynomials. In present paper, we introduce Dowling type generalization -Dowling–Lah We give a comprehensive study them using results author on -Whitney–Lah numbers, coefficients these

Journal: :Applied mathematics in science and engineering 2022

Degenerate Dowling and degenerate r-Dowling polynomials were introduced earlier as versions further generalizations of polynomials. The aim this paper is to show their connections with Poisson central moments for a random variable certain parameter Charlier

  Dowling-Degos disease is a rare sporadic or autosomal dominant pigmentary entity, in which clusters of papules and reticulate macules slowly develop with predominance in flexural regions. This entity is due to mutations in the keratin 5 gene, and is related with other cutaneous disorders. We report the sporadic form of Dowling-Degos disease in an elderly man with multiple seborrheickeratosis ...

2013
MOURAD RAHMANI M. Rahmani

In this paper, we study some properties of Whitney numbers of Dowling lattices and related polynomials. We answer the following question: there is a relation between Stirling and Eulerian polynomials. Can we find a new relation between Dowling polynomials and other polynomials generalizing Eulerian polynomials? In addition, some congruences for the Dowling numbers are given. Mathematics Subject...

Journal: :Discrete Mathematics 2006
Joseph E. Bonin

Our main result describes how to extend a matroid so that its ground set is a modular hyperplane of the larger matroid. This result yields a new way to view Dowling lattices and new results about line-closed geometries. We complement these topics by showing that line-closure gives simple geometric proofs of the (mostly known) basic results about Dowling lattices. We pursue the topic of line-clo...

Gh Jafari SZ Famili

Dowling –Degos disease is a rare condition. It is inherited by an autosomal dominant gene. It usually presents in adult life as small, pigmented, asymptomatic macules in flexural regions. We report a 35-year-old woman with Dowling- Degos disease, in whom the reticular pigmentation confined to the genital area.

Journal: :medical journal of islamic republic of iran 0
vitorino modesto dos santos internal medicine department of armed forces hospital (hfa) and catholic university (ucb), brasília-df, brazil.سازمان اصلی تایید شده: 0 دانشگاه های خارج از کشور nayanne lays dos santos pereira renata faria silva fabio henrique de oliveira silva internal medicine department of hfa.سازمان اصلی تایید شده: 0 موسسات و مراکز خارج از کشور cacilda joyce ferreira da silva garcia pathology division of hfa.سازمان اصلی تایید شده: 0 موسسات و مراکز خارج از کشور maria aparecida alves de figueiredo sousa dermatology division of hfa.سازمان اصلی تایید شده: 0 موسسات و مراکز خارج از کشور

dowling-degos disease is a rare sporadic or autosomal dominant pigmentary entity, in which clusters of papules and reticulate macules slowly develop with predominance in flexural regions. this entity is due to mutations in the keratin 5 gene, and is related with other cutaneous disorders. we report the sporadic form of dowling-degos disease in an elderly man with multiple seborrheickeratosis in...

Journal: :European Journal of Combinatorics 2009

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