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We study moment rearrangement invariant spaces, which contain as particular cases the generalized Grand Lebesgue Spaces, and provide norm estimates for some operators, not necessarily linear, acting between some measurable rearrangement…

Functional Analysis · Mathematics 2022-12-26 M. R. Formica , E. Ostrovsky , L. Sirota

We calculate in this paper the norm of composition, multiplicative and product operator, generated by multiplicative and measurable argument transformation between two different ordinary Lebesgue-Riesz and Grand Lebesgue spaces. We set…

Functional Analysis · Mathematics 2016-08-12 E. Ostrovsky , L. Sirota

In this paper we estimate the norm of operator acting from one Bilateral Grand Lebesgue Space (BGLS) into other Bilateral Grand Lebesgue Space. We also give some examples to show the sharpness of offered inequalities.

Functional Analysis · Mathematics 2009-12-15 E. Ostrovsky , L. Sirota , E. Rogover

We study the problem estimation of classical Lebesgue-Riesz and Grand Lebesgue Norm for the fractional integrals and derivatives for the functions from the classical Lebesgue-Riesz spaces as well as from the modified Besov's spaces.

Functional Analysis · Mathematics 2015-04-17 E. Ostrovsky , L. Sirota

We provide the conditions for the boundedness of the Bochner-Riesz operator acting between two different Grand Lebesgue Spaces. Moreover we obtain a lower estimate for the constant appearing in the Lebesgue-Riesz norm estimation of the…

Functional Analysis · Mathematics 2020-06-04 Maria Rosaria Formica , Eugeny Ostrovsky , Leonid Sirota

We derive in this preprint the exact up to multiplicative constant non-asymptotical estimates for the norms of some non-linear in general case operators, for example, the so-called maximal functional operators, in two probabilistic…

Functional Analysis · Mathematics 2017-06-26 E. Ostrovsky , L. Sirota

We establish imbedding properties between Grand Lebesgue Spaces and (generalized) Lorentz-Zygmund ones. We extend some known previous results concerning imbedding theorems between Grand Lebesgue and classical Lebesgue-Riesz spaces and we…

Functional Analysis · Mathematics 2022-12-26 Maria Rosaria Formica , Eugeny Ostrovsky , Leonid Sirota

We extend the classical Hardy-Sobolev-Poincare-Wirtinger inequalities from the ordinary Lebesgue-Riesz spaces into the Grand Lebesgue ones, with exact constants evaluation.

Functional Analysis · Mathematics 2022-06-06 M. R. Formica , E. Ostrovsky , L. Sirota

In this paper we obtain the non - asymptotic estimations for Riesz's and Bessel's potential integral operators in the so - called Bilateral Grand Lebesgue Spaces. We also give examples to show the sharpness of these inequalities.

Functional Analysis · Mathematics 2009-07-21 E. Ostrovsky , E. Rogover , L. Sirota

We derive the non-improvable Grand Lebesgue Space norm estimations for multivariate and multidimensional operator of infimal convolution.

Functional Analysis · Mathematics 2021-02-17 M. R. Formica , E. Ostrovsky , L. Sirota

We give in this short paper a sharp estimate for the norm of a multivariate dilation operator generated by multi-matrix (tensor) linear argument transformation (dilation operator) between two different weight Lebesgue-Riesz and Grand…

Functional Analysis · Mathematics 2015-03-19 E. Ostrovsky , L. Sirota

In this short report we estimate and calculate the exact value of norms of multilinear integral operators having homogeneous kernel, acting between two Grand Lebesgue Spaces.

Functional Analysis · Mathematics 2024-01-25 Maria Rosaria Formica , Eugeny Ostrovsky , Leonid Sirota

We study in this short report the boundedness of classical non-linear operators: Nemytskii, Urysohn, Hammerstein acting from one Grand Lebesgue Space to another one, and deduce some its upper norm estimates. We bring also some examples to…

Functional Analysis · Mathematics 2021-10-07 M. R. Formica , E. Ostrovsky , L. Sirota

We derive a sharp Grand Lebesgue Space norm estimations for normalized eigen functions for the Laplace-Beltrami operator defined on the compact smooth Riemann manifold. These estimates allow us to deduce in particular the exponential…

Functional Analysis · Mathematics 2021-10-06 M. R. Formica , E. Ostrovsky , L. Sirota

We obtain in this short article the bilateral non-asymptotic estimations for the norm in Lebesgue-Riesz and bilateral Grand Lebesgue spaces of the so-called fractional Laplace integral transform. We give also examples to show the sharpness…

Functional Analysis · Mathematics 2014-05-08 E. Ostrovsky , L. Sirota

We obtain in this short article the non-asymptotic estimations for the norm of (generalized) Cesaro-Hardy integral operators in the so-called Bilateral Grand Lebesgue Spaces. We also give examples to show the sharpness of these…

Functional Analysis · Mathematics 2013-07-23 E. Ostrovsky , L. Sirota

We derive sharp non - asymptotical Lebesgue - Riesz as well as Grand Lebesgue Space norm estimations for different norms of matrix martingales through these norms for the correspondent martingale differences and through the entropic…

Probability · Mathematics 2024-01-25 Maria Rosaria Formica , Eugeny Ostrovsky , Leonid Sirota

We derive bilateral estimates for the constants appearing in the Fourier transform restricted theorems on the Euclidean sphere for the ordinary and especially radial functions belonging to the Lebesgue-Riesz spaces as well as belonging to…

Classical Analysis and ODEs · Mathematics 2021-10-07 M. R. Formica , E. Ostrovsky , L. Sirota

We intend to derive the moment and exponential tail estimates for the so-called bivariate or more generally multivariate functional operations, not necessary to be linear or even multilinear. We will show also the strong or at last weak…

Functional Analysis · Mathematics 2018-05-08 E. Ostrovsky , L. Sirota

In this paper we consider composition operator generated by nonsingular measurable transformation between two different Grand Lebesgue Spaces (GLS); we investigate the boundedness, compactness and essential norm of composition operators.

Functional Analysis · Mathematics 2013-08-09 E. Ostrovsky , L. Sirota
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