Results 11 to 20 of about 15,675 (260)

Pointwise Multipliers on Weak Morrey Spaces [PDF]

open access: goldAnalysis and Geometry in Metric Spaces, 2020
We consider generalized weak Morrey spaces with variable growth condition on spaces of homogeneous type and characterize the pointwise multipliers from a generalized weak Morrey space to another one.
Kawasumi Ryota, Nakai Eiichi
doaj   +5 more sources

Smooth pointwise multipliers of modulation spaces [PDF]

open access: diamondAnalele Universitatii "Ovidius" Constanta - Seria Matematica, 2012
Abstract Let 1 < p, q < ∞ and s, r ∈ ℝ. It is proved that any function in the amalgam space W(Hrp(ℝd), ℓ∞), where p' is the conjugate exponent to p and Hrp′ (ℝd) is the Bessel potential space, defines a bounded pointwise multiplication operator in the modulation space Msp,q(ℝd), whenever r > |s ...
Ghassem Narimani
openalex   +4 more sources

Pointwise Multipliers of Weighted BMO Spaces [PDF]

open access: bronzeProceedings of the American Mathematical Society, 1993
In a recent paper by S. Bloom (Pointwise multipliers of weighted B M O BMO spaces, Proc. Amer. Math. Soc. 105 (1989), 950-960), there are some inaccuracies. In this note, we give a counterexample to his "theorem" and a corrected form with proof under a suitable condition on weights.
Kôzô Yabuta
openalex   +3 more sources

Pointwise multipliers on martingale Campanato spaces [PDF]

open access: bronzeStudia Mathematica, 2014
We introduce generalized Campanato spaces $\mathcal{L}_{p, }$ on a probability space $( ,\mathcal{F},P)$, where $p\in[1,\infty)$ and $ :(0,1]\to(0,\infty)$. If $p=1$ and $ \equiv1$, then $\mathcal{L}_{p, }=\mathrm{BMO}$. We give a characterization of the set of all pointwise multipliers on $\mathcal{L}_{p, }$.
Eiichi Nakai, Gaku Sadasue
openalex   +4 more sources

Pointwise multipliers of Calderón‐Lozanovskiǐ spaces

open access: greenMathematische Nachrichten, 2012
AbstractSeveral results concerning multipliers of symmetric Banach function spaces are presented firstly. Then the results on multipliers of Calderón‐Lozanovskiǐ spaces are proved. We investigate assumptions on a Banach ideal space E and three Young functions φ1, φ2 and φ, generating the corresponding Calderón‐Lozanovskiǐ spaces \documentclass{article}\
Paweł Kolwicz   +2 more
openalex   +6 more sources

Pointwise multipliers for reverse Holder spaces [PDF]

open access: bronzeStudia Mathematica, 1994
The author gives necessary and sufficient conditions for a positive function to multiply reverse Hölder spaces \(RH_p\) into other reverse Hölder spaces \(RH_q\) when \(0< q\leq p\leq \infty\), and considers local variants and weak reverse Hölder conditions. Let \(\Omega\) be an open subset of \(\mathbb{R}^n\).
Stephen M. Buckley
openalex   +3 more sources

Pointwise multipliers on the weighted BMOA space [PDF]

open access: diamondJournal of Physics: Conference Series, 2020
Abstract Let D = {z : |z| < 1} be the unit disk in the complex plane C, Φ :
Shanli Ye
openalex   +2 more sources

Pointwise multipliers on weak Orlicz spaces [PDF]

open access: greenHiroshima Mathematical Journal, 2018
We characterize the pointwise multipliers from a weak Orlicz space to another weak Orlicz space.
Ryota Kawasumi, Eiichi Nakai
openalex   +4 more sources

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