Results 71 to 80 of about 4,962 (192)

Real interpolation for non-distant marcinkiewicz spaces

open access: yesRevista Matemática Complutense, 2001
Lorentz-Zygmund spaces \(L^{p,r}(\log L)^\alpha\), introduced by \textit{C. Bennett} and \textit{K. Rudnick} in [Diss. Math. 175, 67 p. (1980; Zbl 0456.46028)], were generalized to new spaces \(L_{p,\alpha,E}\) on \((0,1)\) by the author in [J. Anal. Math.
openaire   +2 more sources

Commutators for Approximation Spaces and Marcinkiewicz-Type Multipliers

open access: yesJournal of Approximation Theory, 1999
Taking into account that the description of approximation spaces and the calculation of almost optimal approximation elements, in combination with real interpolation, are very useful in the commutation theorems, the author shows, in this paper, under some conditions weaker than those of Marcinkievicz multiplier theorem, that the multiplier operator ...
Cerdà, Joan   +2 more
openaire   +2 more sources

Who Runs for Higher Office? Electoral Institutions and Level‐Hopping Attempts in Germany's State Legislatures

open access: yesLegislative Studies Quarterly, Volume 49, Issue 3, Page 481-549, August 2024.
Do electoral institutions matter for subnational legislators’ career choices in a multi‐level polity? The paper considers this question by analyzing candidacies of sitting German State MPs for the Federal parliament (“level‐hopping attempts”), leveraging cross‐ and within‐legislature variation in electoral rules (due to the widespread adoption of mixed‐
Leonardo Carella
wiley   +1 more source

Reduction procedure for obtaining solutions of the scalar additive Jump problem and Riemann boundary value problem in vectorial Clifford analysis

open access: yesMathematical Methods in the Applied Sciences, Volume 47, Issue 11, Page 8611-8625, 30 July 2024.
In this paper, we study existence of solutions to the scalar additive Jump problem and the Riemann boundary value problems in the context of vectorial Clifford analysis on domains with fractal boundaries. A reduction procedure is applied with great effectiveness to find the solution of the problems.
Carlos Daniel Tamayo Castro   +2 more
wiley   +1 more source

GEOMETRY AND ANALYTIC BOUNDARIES OF MARCINKIEWICZ SEQUENCE SPACES

open access: yesThe Quarterly Journal of Mathematics, 2009
We investigate the geometric structure of the unit ball of the Marcinkiewicz sequence space mΨ, giving characterisations of its real and complex extreme points and of the exposed points in terms of the symbol Ψ. Using our knowledge of the geometry of m0Ψ we then give necessary and sufficient conditions for a subset of m0Ψ to be a boundary for Au(Bm0Ψ),
Boyd, Christopher   +1 more
openaire   +2 more sources

ESTIMATES FOR MARCINKIEWICZ INTEGRALS IN BMO AND CAMPANATO SPACES [PDF]

open access: yesGlasgow Mathematical Journal, 2007
AbstractIn this paper, the authors consider the behavior on BMO($\mathbb R^n$) and Campanato spaces for the higher-dimensional Marcinkiewicz integral operator which is defined by where Ω is homogeneous of degree zero, has mean value zero and is integrable on the unit sphere.
Hu, Guoen, Meng, Yan, Yang, Dachun
openaire   +2 more sources

On noncommutative distributional Khintchine type inequalities

open access: yesBulletin of the London Mathematical Society, Volume 56, Issue 7, Page 2278-2295, July 2024.
Abstract The purpose of this paper is to provide distributional estimates for the series of the form ∑k=1∞xk⊗rk$\sum _{k=1}^\infty x_k\otimes r_k$ with {xk}k⩾1$\lbrace x_k\rbrace _{k\geqslant 1}$ being elements from noncommutative Lorentz spaces Λlog1/2(M)$\Lambda _{\log ^{1/2}}(\mathcal {M})$ and {rk}k⩾1$\lbrace r_k\rbrace _{k\geqslant 1}$ being ...
Yong Jiao   +3 more
wiley   +1 more source

Commutators of log-Dini-type parametric Marcinkiewicz operators on non-homogeneous metric measure spaces

open access: yesJournal of Inequalities and Applications, 2021
Let ( X , d , μ ) $(\mathcal{X}, d, \mu )$ be a non-homogeneous metric measure space, which satisfies the geometrically doubling condition and the upper doubling condition.
Tao Xiangxing, Zhang Qiange
doaj   +1 more source

Triangular maximal operators on locally finite trees

open access: yesMathematika, Volume 70, Issue 3, July 2024.
Abstract We introduce the centred and the uncentred triangular maximal operators T$\mathcal {T}$ and U$\mathcal {U}$, respectively, on any locally finite tree in which each vertex has at least three neighbours. We prove that both T$\mathcal {T}$ and U$\mathcal {U}$ are bounded on Lp$L^p$ for every p$p$ in (1,∞]$(1,\infty]$, that T$\mathcal {T}$ is also
Stefano Meda, Federico Santagati
wiley   +1 more source

Estimates of the Cordoba - Fernandez operator in Marcinkiewicz spaces

open access: yesМоделирование и анализ информационных систем, 2009
In the A. Cordoba and P. Fernandez research of the divergence of greedy algorithms in Lebesgue spaces some maximum operator P*(x) played the key role. This article reviews the assessment P*(x) in Marcinkiewicz spaces.
Y. I. Berezhnoi, D. S. Gladkikh
doaj  

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