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The study of Schatten classes has a long tradition in geometric functional analysis and related fields. In this paper we study a variety of geometric and probabilistic aspects of finite-dimensional Schatten classes of not necessarily square…

Functional Analysis · Mathematics 2024-04-11 Michael Juhos , Zakhar Kabluchko , Joscha Prochno

We consider norms on a complex separable Hilbert space such that $\langle a\xi,\xi\rangle\leq\|\xi\|^2\leq\langle b\xi,\xi\rangle$ for positive invertible operators $a$ and $b$ that differ by an operator in the Schatten class. We prove that…

Functional Analysis · Mathematics 2020-02-21 Martin Miglioli

In this work we study Schatten-von Neumann classes of tensor products of invariant operators on Hilbert spaces. In the first part we first deduce some spectral properties for tensors of anharmonic oscillators thanks to the knowledge on…

Functional Analysis · Mathematics 2025-07-22 Julio Delgado , Liliana Posada , Michael Ruzhansky

In this paper, we consider the Strichartz estimates for orthonormal systems in the context of randomization. Frank, Lewin, Lieb, and Seiringer first proved the orthonormal Strichartz estimates. After that, many authors have studied this…

Analysis of PDEs · Mathematics 2026-01-14 Sonae Hadama , Takuto Yamamoto

We obtain a number of explicit estimates for quasi-norms of pseudo-differential operators in the Schatten-von Neumann classes $S_q$ with $0<q\le 1$. The estimates are applied to derive semi-classical bounds for operators with smooth or…

Spectral Theory · Mathematics 2022-01-27 Alexander V. Sobolev

In this work, we analyze the variance of a stochastic estimator for computing Schatten norms of matrices. The estimator extracts information from a single sketch of the matrix, that is, the product of the matrix with a few standard Gaussian…

Numerical Analysis · Mathematics 2025-01-17 Ya-Chi Chu , Alice Cortinovis

In this paper we study spectral properties of non-selfadjoint operators with the discrete spectrum. The main challenge is to represent a complete description of belonging to the Schatten class through the properties of the Hermitian real…

Functional Analysis · Mathematics 2024-01-18 Maksim V. Kukushkin

Sukochev and Zanin resolved an open problem due to B. Simon concerning optimal constants in H\"older inequality for the weak Schatten classes of compact operators. In this note we observe that these constants, by introducing the modified…

Functional Analysis · Mathematics 2024-03-28 Yi C. Huang , Sijie Luo

We develop a new method for obtaining bounds on the negative eigenvalues of self-adjoint operators B in terms of a Schatten norm of the difference of the semigroups generated by A and B, where A is an operator with non-negative spectrum.…

Spectral Theory · Mathematics 2008-09-17 M. Demuth , G. Katriel

We study the learnability of a class of compact operators known as Schatten--von Neumann operators. These operators between infinite-dimensional function spaces play a central role in a variety of applications in learning theory and inverse…

Machine Learning · Statistics 2019-02-25 Puoya Tabaghi , Maarten de Hoop , Ivan Dokmanić

We discuss structured Schatten norms for tensor decomposition that includes two recently proposed norms ("overlapped" and "latent") for convex-optimization-based tensor decomposition, and connect tensor decomposition with wider literature…

Machine Learning · Statistics 2013-03-27 Ryota Tomioka , Taiji Suzuki

We study the $\varrho$-th order variation seminorm of a general Ornstein--Uhlenbeck semigroup $\left(\mathcal H_t\right)_{t>0}$ in $\mathbb R^n$, taken with respect to $t$. We prove that this seminorm defines an operator of weak type…

Functional Analysis · Mathematics 2025-02-04 Valentina Casarino , Paolo Ciatti , Peter Sjögren

The first our aim is to clarify the results obtained by Lidskii devoted to the decomposition on the root vector system of the non-selfadjoint operator. We use a technique of the entire function theory and introduce a so-called Schatten-von…

Functional Analysis · Mathematics 2022-04-08 Maksim V. Kukushkin

We revisit a classical assumption for analyzing stochastic gradient algorithms where the squared norm of the stochastic subgradient (or the variance for smooth problems) is allowed to grow as fast as the squared norm of the optimization…

Optimization and Control · Mathematics 2025-04-15 Ahmet Alacaoglu , Yura Malitsky , Stephen J. Wright

Chaining techniques show that if X is an isotropic log-concave random vector in R^n and Gamma is a standard Gaussian vector then E |X| < C n^{1/4} E |Gamma| for any norm |*|, where C is a universal constant. Using a completely different…

Functional Analysis · Mathematics 2015-05-06 Ronen Eldan , Joseph Lehec

Suppose that we observe entries or, more generally, linear combinations of entries of an unknown $m\times T$-matrix $A$ corrupted by noise. We are particularly interested in the high-dimensional setting where the number $mT$ of unknown…

Statistics Theory · Mathematics 2011-05-16 Angelika Rohde , Alexandre B. Tsybakov

We extend Feichtinger's minimality property on smallest non-trivial time-frequency shift invariant Banach spaces, to the quasi-Banach case. Analogous properties are deduced for certain matrix classes. We use these results to prove that…

Functional Analysis · Mathematics 2016-11-11 Joachim Toft

We prove lower bounds for the approximation error of the variation-diminishing Schoenberg operator on the interval $[0,1]$ in terms of classical moduli of smoothness depending on the degree of the spline basis using a functional analysis…

Classical Analysis and ODEs · Mathematics 2014-02-12 Johannes Nagler , Paula Cerejeiras , Brigitte Forster

The variance conjecture in Asymptotic Convex Geometry stipulates that the Euclidean norm of a random vector uniformly distributed in a (properly normalised) high-dimensional convex body $K\subset {\mathbb R}^n$ satisfies a Poincar\'e-type…

Functional Analysis · Mathematics 2018-05-09 Beatrice-Helen Vritsiou

We prove an extended version of Cordes' lemma concerning trace-class properties of some special pseudo-differential operators. This version of Cordes' lemma is used to improve the results in \cite{Arsu} concerning the Schatten-class…

Functional Analysis · Mathematics 2007-05-23 Gruia Arsu
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