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Hayashi's Pinching Inequality, which establishes a matrix inequality between a semidefinite matrix and a multiple of its "pinched" version via a projective measurement, has found many applications in quantum information theory and beyond.…

Quantum Physics · Physics 2025-10-23 Andreas Winter

We show that classical Wilczynski--Se-ashi invariants of linear systems of ordinary differential equations are generalized in a natural way to contact invariants of non-linear ODEs. We explore geometric structures associated with equations…

Differential Geometry · Mathematics 2008-07-22 Boris Doubrov

In this paper we propose and prove some generalizations and sharpenings of certain inequalities of Wilker;'s and Shafer-Fink's type. Application of the Wu-Debnath theorem enabled us to prove some double sided inequalities.

Classical Analysis and ODEs · Mathematics 2019-10-15 Marija Rasajski , Tatjana Lutovac , Branko Malesevic

The Hardy-Littlewood-P\'{o}lya inequality of majorization is extended to the framework of ordered Banach spaces. Several applications illustrating our main results are also included.

Functional Analysis · Mathematics 2021-04-26 Constantin P. Niculescu

In this paper, we obtained some new estimates on generalization of Hadamard, Ostrowski and Simpson-like type inequalities for harmonically quasi-convex functions via Riemann Liouville fractional integral.

Classical Analysis and ODEs · Mathematics 2014-01-14 İmdat İscan

A generalization of an inequality from IMO is proven.

General Mathematics · Mathematics 2014-11-18 Nikolai Nikolov

We generalize Romanoff's theorem. Also, we obtain a result on sums related to Euler's totient function.

Number Theory · Mathematics 2024-03-05 Artyom Radomskii

Minkowski's question mark function is the distribution function of a singular continuous measure: we study this measure from the point of view of logarithmic potential theory and orthogonal polynomials. We conjecture that it is regular, in…

Classical Analysis and ODEs · Mathematics 2016-10-31 Giorgio Mantica

We study a generalization of the classical Marcinkiewicz-Zygmund inequalities. We relate this problem to the sampling sequences in the Paley-Wiener space and by using this analogy we give sharp necessary and sufficient computable conditions…

Classical Analysis and ODEs · Mathematics 2010-07-08 Joaquim Ortega-Cerdà , Jordi Saludes

We introduce algebras which are inductive limits of Banach spaces and carry inequalities which are counterparts of the inequality for the norm in a Banach algebra. We then define an associated Wiener algebra, and prove the corresponding…

Functional Analysis · Mathematics 2013-04-30 Daniel Alpay , Guy Salomon

In this paper, we first establish refined versions of the Bohr inequalities for the class of holomorphic functions from the unit ball $B_X$ of a complex Banach space $X$ into $\mathbb{C}$. As applications, we will establish refined Bohr…

Complex Variables · Mathematics 2024-09-26 Molla Basir Ahamed , Sabir Ahammed , Hidetaka Hamada

In this paper, we established the boundedness of m-linear Marcinkiewicz integral on Campanato type spaces. We showed that if the $m$-linear Marcinkiewicz integral is finite for one point, then it is finite almost everywhere. Moreover, the…

Classical Analysis and ODEs · Mathematics 2015-12-03 Qingying Xue , Kozo Yabuta

We give an alternative proof of a sharp generalization of an integral inequality for the dyadic maximal operator due to which the evaluation of the Bellman function of this operator with respect to two variables, is possible. This last…

Classical Analysis and ODEs · Mathematics 2016-04-12 Eleftherios N. Nikolidakis

Based on the local fractional calculus, we establish some new generalizations of H\"{o}lder's inequality. By using it, some results on the generalized integral inequality in fractal space are investigated in detail.

General Mathematics · Mathematics 2011-11-10 Guang-Sheng Chen

In this note we use recent results concerning the sum theorem for maximal monotone multifunctions in general Banach spaces to find new characterizations and properties of regular maximal monotone multifunctions and then use these to…

Functional Analysis · Mathematics 2008-12-16 Andrei Verona , Maria Elena Verona

We present moment inequalities for completely degenerate Banach space valued (generalized) U-statistics of arbitrary order. The estimates involve suprema of empirical processes which, in the real-valued case, can be replaced by simpler…

Probability · Mathematics 2007-05-23 Radosław Adamczak

In this paper, first we give a new generalization of the Bohr's inequality for the class of bounded analytic functions $\mathcal{B'}$ and for the class of sense-preserving $K$-quasiconformal harmonic mappings of the form $f=h+\overline{g},$…

Complex Variables · Mathematics 2021-04-14 Ramakrishnan Vijayakumar

We establish H\"older type inequalities for Lorentz sequence spaces and their duals. In order to achieve these and some related inequalities, we study diagonal multilinear forms in general sequence spaces, and obtain estimates for their…

Functional Analysis · Mathematics 2012-01-18 Daniel Carando , Verónica Dimant , Pablo Sevilla-Peris

The classical Gagliardo-Nirenberg interpolation inequality is a well-known estimate which gives, in particular, an estimate for the Lebesgue norm of intermediate derivatives of functions in Sobolev spaces. We present an extension of this…

Functional Analysis · Mathematics 2018-12-12 Alberto Fiorenza , Maria Rosaria Formica , Tomas Roskovec , Filip Soudsky

In this paper, we propose a generalized Gronwall inequality through the fractional integral with respect to another function. The Cauchy-type problem for a nonlinear differential equation involving the $\psi$-Hilfer fractional derivative…

Classical Analysis and ODEs · Mathematics 2017-09-13 J. Vanterler da Costa Sousa , E. Capelas de Oliveira