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Ideals are one of the main topics of interest to the study of the order structure of an algebra. Due to their nice properties, ideals have an important role both in lattice theory and semigroup theory. Two natural concepts of ideal can be…

Rings and Algebras · Mathematics 2013-02-25 Joao Pita Costa

We prove the Effros-Hahn conjecture for groupoid algebras with coefficients in a sheaf, obtaining as a consequence a description of the ideals in skew inverse semigroup rings. We also use the description of the ideals to characterize when…

Rings and Algebras · Mathematics 2024-04-24 Gilles G. de Castro , Daniel Gonçalves , Benjamin Steinberg

Classical global convergence results for first-order methods rely on uniform smoothness and the \L{}ojasiewicz inequality. Motivated by properties of objective functions that arise in machine learning, we propose a non-uniform refinement of…

Machine Learning · Computer Science 2022-06-03 Jincheng Mei , Yue Gao , Bo Dai , Csaba Szepesvari , Dale Schuurmans

A plethora of spaces in Functional Analysis (Braun-Meise-Taylor and Carleman ultradifferentiable and ultraholomorphic classes; Orlicz, Besov, Lipschitz, Lebesque spaces, to cite the main ones) are defined by means of a weighted structure,…

Functional Analysis · Mathematics 2022-12-29 Javier Jiménez-Garrido , Javier Sanz , Gerhard Schindl

In a previous article by two of the present authors and S. Bonzio, \L ukasiewicz near semirings were introduced and it was proven that basic algebras can be represented (precisely, are term equivalent to) as near semirings. In the same work…

Logic · Mathematics 2018-03-15 Ivan Chajda. Davide Fazio , Antonio Ledda

We introduce the notion of non-lc ideal sheaves. It is an analogue of the notion of multiplier ideal sheaves. We establish the restriction theorem, which seems to be the most important property of non-lc ideal sheaves.

Algebraic Geometry · Mathematics 2015-01-14 Osamu Fujino

In this paper we obtain some statements concerning ideals of polynomials and apply these results in a number of different situations. Among other results, we present new characterizations of $\mathcal{L}_{\infty}$-spaces, Coincidence…

Functional Analysis · Mathematics 2007-05-23 Daniel M. Pellegrino

We prove that any meager quasi-analytic subgroup of a topological group $G$ belongs to every $\sigma$-ideal $\mathcal I$ on $G$ possessing the closed $\pm n$-Steinhaus property for some $n\in\mathbb N$. An ideal $\mathcal I$ on a…

General Topology · Mathematics 2015-10-01 Taras Banakh , Lesia Karchevska , Alex Ravsky

In this thesis, we focus on the study of some classes of monomial ideals, namely lexsegment ideals and monomial ideals with linear quotients.

Commutative Algebra · Mathematics 2008-07-11 Anda Olteanu

We prove an approximate functional equation for the central value of the L-series attached to an irreducible cuspidal automorphic representation of GL(m) over a number field with unitary central character. We investigate the decay rate of…

Number Theory · Mathematics 2024-11-18 Gergely Harcos

We introduce a class of ideals generated by a set of 2-minors of $m\times n$-matrix of indeterminates indexed by a pair of graphs. This class of ideals is a natural common generalization of binomial edge ideals and ideals generated by…

Commutative Algebra · Mathematics 2015-01-14 Viviana Ene , Jürgen Herzog , Takayuki Hibi , Ayesha Asloob Qureshi

We extend a precise renorming result of Godefroy, Kalton, and Lancien regarding asymptotically uniformly smooth norms of separable Banach spaces with Szlenk index $\omega$. For every ordinal $\xi$, we characterize the operators, and…

Functional Analysis · Mathematics 2017-06-21 Ryan M Causey

A constructive procedure is given to determine all ideals of a solvable Lie algebra. This is used in determining algorithmically all conjugacy classes of subalgebras of a given solvable Lie algebra.

Representation Theory · Mathematics 2023-05-16 Sajid Ali , Hassan Azad , Indranil Biswas , Fazal M. Mahomed

In this paper, we define on one hand, the notions of characteristics as well as central characteristics ideals of a given Leibniz algebra g and provide a necessary condition under which for two given subalgebras J and K of g such that, J IS…

Rings and Algebras · Mathematics 2024-01-04 Narcisse G. Bell Bogmis , Calvin Tcheka , Guy R. Biyogmam

In this paper, based on concepts of convex sets and convex functions, we introduce new concepts of functions, Young functions, strong Young functions and Orlicz functions by relaxing definitions of functions, Young functions, strong Young…

Functional Analysis · Mathematics 2019-12-13 Abdulhameed Qahtan Abbood Altai , Nada Mohammed Abbas Alsafar

We consider the following conjecture: if X is a smooth projective variety over a field of characteristic zero, then there is a dense set of reductions X_s of X to positive characteristic such that the action of the Frobenius morphism on the…

Commutative Algebra · Mathematics 2011-06-02 Mircea Mustata , Vasudevan Srinivas

We introduce and explore the concept of positive ideals for both linear and multilinear operators between Banach lattices. This paper delineates the fundamental principles of these new classes and provides techniques for constructing…

Functional Analysis · Mathematics 2024-08-27 Athmane Ferradi , Abdelaziz Belaada , Khalil Saadi

We provide sufficient conditions for the Lojasiewicz-Simon gradient inequality to hold on a submanifold of a Banach space and discuss the optimality of our assumptions. Our result provides a tool to study asymptotic properties of…

Functional Analysis · Mathematics 2020-07-27 Fabian Rupp

We consider the counting function of ideals in a given ideal class of a number field of degree $d$. This describes, at least conjecturally, the Fourier coefficients of an automorphic form on $\text{GL}(d)$, typically not a Hecke eigenform…

Number Theory · Mathematics 2024-01-09 Kam Cheong Au

After sketching the basic theory of injective ideals of homogeneous polynomials, we characterize injective polynomial ideals by means of a domination property and applications of this characterization to some classical operator ideals and…

Functional Analysis · Mathematics 2019-05-08 Geraldo Botelho , Leodan A. Torres