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In 1994, Orlik and Terao introduced a commutative Artinian analog S/I(A) of the Orlik-Solomon algebra of a hyperplane arrangement A to answer a question of Aomoto. A central topic of investigation in the study of Artinian algebras is the…

Commutative Algebra · Mathematics 2026-05-20 Nicholas Gaubatz , Hal Schenck

We give a local normal form for Dirac structures. As a consequence, we show that the dimensions of the pre-symplectic leaves of a Dirac manifold have the same parity. We also show that, given a point $m$ of a Dirac manifold $M$, there is a…

Symplectic Geometry · Mathematics 2014-01-14 Jean-Paul Dufour , Aissa Wade

We prove two weak compactness criteria in Musielak-Orlicz spaces for $N$-functions satisfying the $\Delta_2$-condition. They extend criteria from And\^o for Orlicz spaces to this setting of non-symmetrical Banach function spaces. As…

Functional Analysis · Mathematics 2026-01-28 Mauro Sanchiz

In LM, we proved a family version of the famous Witten rigidity theorems and several family vanishing theorems for elliptic genera. In this paper, we gerenalize our theorems LM in two directions. First we establish a family rigidity theorem…

Differential Geometry · Mathematics 2007-05-23 Kefeng LIU , Xiaonan MA

We detail the construction of a weak Poisson bracket over a submanifold of a smooth manifold M with respect to a local foliation of this submanifold. Such a bracket satisfies a weak type Jacobi identity but may be viewed as a usual Poisson…

Mathematical Physics · Physics 2016-05-17 Simon L. Lyakhovich , Matthew T. Peddie , Alexey A. Sharapov

Weak contact metric manifolds, i.e., the linear complex structure on the contact distribution is replaced by a nonsingular skew-symmetric tensor, defined by the author and R. Wolak, allowed a new look at the theory of contact manifolds. In…

Differential Geometry · Mathematics 2024-01-09 Vladimir Rovenski

This paper is concerned with an elliptic system of Kirchhoff type, driven by the variable-order fractional $p(x)$-operator. With the help of the direct variational method and Ekeland variational principle, we show the existence of a weak…

Analysis of PDEs · Mathematics 2021-02-18 Yong Wu , Zhenhua Qiao , Mohamed Karim Hamdani , Bingyu Kou , Libo Yang

In this paper, we consider Dirichlet boundary value problem involving the anisotropic $p(x)$-Laplacian, where $p(x)= (p_1(x), ..., p_n(x))$, with $p_i(x)> 1$ in $\overline{\Omega}$. Using the topological degree constructed by Berkovits, we…

Analysis of PDEs · Mathematics 2024-11-06 Pablo Ochoa , Analía Silva , Federico Valverde

We study complex Dirac structures, that is, Dirac structures in the complexified generalized tangent bundle. These include presymplectic foliations, transverse holomorphic structures, CR-related geometries and generalized complex…

Differential Geometry · Mathematics 2023-12-19 Dan Aguero , Roberto Rubio

In this paper we prove that if $\Lambda\in M_p(\mathbb R^N)$ and has compact support then $\Lambda$ is a weak summability kernel for $1<p<\infty$, where $M_p(\mathbb R^N)$ is the space of multipliers of $L^p(\mathbb R^N)$.

Functional Analysis · Mathematics 2007-05-23 P. Mohanty , S. Madan

In this paper, we study weak bialgebras and weak Hopf algebras. These algebras form a class wider than bialgebras respectively Hopf algebras. The main results of this paper are Kaplansky's constructions type which lead to weak bialgebras or…

Rings and Algebras · Mathematics 2010-01-14 Zoheir Chebel , Abdenacer Makhlouf

We define a higher analogue of Dirac structures on a manifold M. Under a regularity assumption, higher Dirac structures can be described by a foliation and a (not necessarily closed, non-unique) differential form on M, and are equivalent to…

Symplectic Geometry · Mathematics 2012-12-27 Marco Zambon

In this paper we study a weaker form of the property $\text{\textbf{L}}_{o,o}$ called the weak $\text{\textbf{L}}_{o,o}$ and its uniform version called the weak $\text{BPB}_{\text{op}}$ which is again a weaker form the property…

Functional Analysis · Mathematics 2023-03-16 Uday Shankar Chakraborty

Fix a weakly minimal (i.e., superstable $U$-rank $1$) structure $\mathcal{M}$. Let $\mathcal{M}^*$ be an expansion by constants for an elementary substructure, and let $A$ be an arbitrary subset of the universe $M$. We show that all…

Logic · Mathematics 2022-03-08 Gabriel Conant , Michael C. Laskowski

For a discrete mechanical system on a Lie group $G$ determined by a (reduced) Lagrangian $\ell$ we define a Poisson structure via the pull-back of the Lie-Poisson structure on the dual of the Lie algebra ${\mathfrak g}^*$ by the…

Numerical Analysis · Mathematics 2025-10-20 Jerrold E. Marsden , Sergey Pekarsky , Steve Shkoller

In this study, we define double weighted variable exponent Sobolev spaces $W^{1,q(.),p(.)}\left( \Omega ,\vartheta _{0},\vartheta \right) $ with respect to two different weight functions. Also, we investigate the basic properties of this…

Analysis of PDEs · Mathematics 2020-06-30 Cihan Unal , Ismail Aydin

Let $L$ be a closed totally real submanifold of $\mathbb{C}^{n}$, $n\ge 2$, which is not Lagrangian. We observe that small enough tubular neighborhoods of $L$ give exotic examples of weak fillings of $ST^{\ast}L$ endowed with its standard…

Symplectic Geometry · Mathematics 2017-10-18 Pierre Py

Although conservative Hamiltonian systems with constraints can be formulated in terms of Dirac structures, a more general framework is necessary to cover also dissipative systems such as gradient and metriplectic systems with constraints.…

Differential Geometry · Mathematics 2013-03-05 Ünver Çiftçi

Ahlgren and Samart relate three cusp forms with complex multiplication to certain weakly holomorphic modular forms using $p$-adic bounds related to their Fourier coefficients. In these three examples, their result strengthens a theorem of…

Number Theory · Mathematics 2021-06-22 Michael Hanson , Marie Jameson

We provide the weak factorization of the Hardy spaces $H^{p}(\mathbb{R}_+, dm_{\lambda})$ in the Bessel setting, for $p\in \left(\frac{2\lambda + 1}{2\lambda + 2}, 1\right]$. As a corollary we obtain a characterization of the boundedness of…

Classical Analysis and ODEs · Mathematics 2017-10-18 Roc Oliver , Brett D. Wick
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