Search Results - "Skripka, Anna"
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Two-sided bounds for the tracial seminorm of multilinear Schur multipliers
Published in Linear algebra and its applications (01-11-2024)“…We establish novel two-sided bounds for the tracial seminorm of multilinear Schur multipliers that tighten previously known bounds. The result is obtained by a…”
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On single commutators in II_{1}-factors
Published in Proceedings of the American Mathematical Society (01-03-2012)“…We investigate the question of whether all elements of trace zero in a II _1…”
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MSE bounds for estimators of matrix functions
Published in Linear algebra and its applications (15-01-2021)“…We establish bounds for Schatten norms of mean squared errors of plug-in estimators of matrix functions that are dimension-independent and optimal with respect…”
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Estimates and trace formulas for unitary and resolvent comparable perturbations
Published in Advances in mathematics (New York. 1965) (30-04-2017)“…We prove estimates for Schatten norms of multiple operator integrals with symbols arising from Fourier series and, as a consequence, derive higher order trace…”
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On positivity of spectral shift functions
Published in Linear algebra and its applications (15-06-2017)“…We show that every spectral shift function of an even order η2k is nonnegative outside the convex hull of the spectrum of an initial operator cvhσ(H); every…”
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Asymptotic expansions for trace functionals
Published in Journal of functional analysis (01-03-2014)“…We obtain Taylor approximations for functionals V↦Tr(f(H0+V)) defined on the bounded self-adjoint operators, where H0 is a self-adjoint operator with compact…”
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Spectral shift function of higher order
Published in Inventiones mathematicae (01-09-2013)“…This paper resolves affirmatively Koplienko’s (Sib. Mat. Zh. 25:62–71, 1984 ) conjecture on existence of higher order spectral shift measures. Moreover, the…”
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Perturbation Formulas for Traces on Normed Ideals
Published in Communications in mathematical physics (01-02-2014)“…We prove perturbation results for traces on normed ideals in semifinite von Neumann algebra factors. This includes the case of Dixmier traces. In particular,…”
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Trace Formulas for Multivariate Operator Functions
Published in Integral equations and operator theory (01-04-2015)“…We extend results on Taylor-like approximations of single-variable operator functions of contractions to the multivariate case, with perturbations allowed to…”
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Erratum to: Perturbation Formulas for Traces on Normed Ideals
Published in Communications in mathematical physics (01-12-2015)Get full text
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Approximation of the Spectral Action Functional in the Case of τ-Compact Resolvents
Published in Integral equations and operator theory (01-09-2023)“…We establish estimates and representations for the remainders of Taylor approximations of the spectral action functional V ↦ τ ( f ( H 0 + V ) ) on bounded…”
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Multilinear Schur multipliers and Schatten properties of operator Taylor remainders
Published in Advances in mathematics (New York. 1965) (07-11-2017)“…We establish sharp conditions on scalar functions and perturbations that guarantee Schatten summability of nth order operator Taylor remainders. In the special…”
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Higher Order Spectral Shift, II. Unbounded Case
Published in Indiana University mathematics journal (01-01-2010)“…We construct higher order spectral shift functions, which represent the remainders of Taylor-type approximations for the value of a function at a perturbed…”
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Functions of unitary operators: Derivatives and trace formulas
Published in Journal of functional analysis (15-03-2016)“…Let A be a bounded self-adjoint operator on a separable Hilbert space H and U0 an arbitrary unitary operator. We derive formulas for higher order derivatives…”
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ON SINGLE COMMUTATORS IN II₁-FACTORS
Published in Proceedings of the American Mathematical Society (01-03-2012)“…We investigate the question of whether all elements of trace zero in a II₁-factor are single commutators. We show that all nilpotent elements are single…”
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16
Higher order spectral shift
Published in Journal of functional analysis (15-08-2009)“…We construct higher order spectral shift functions, extending the perturbation theory results of M.G. Krein [M.G. Krein, On a trace formula in perturbation…”
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Trace formulas for resolvent comparable operators
Published in Advances in mathematics (New York. 1965) (26-02-2015)“…We derive trace formulas for self-adjoint perturbations of self-adjoint operators such that the difference of the resolvents of the initial and perturbed…”
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18
Higher‐order spectral shift for contractions
Published in Proceedings of the London Mathematical Society (01-02-2014)“…We derive strong estimates for Schatten norms of operator derivatives along paths of contractions and apply them to prove existence of higher‐order spectral…”
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19
Spectral shift for relative Schatten class perturbations
Published in Journal of spectral theory (01-01-2022)“…We affirmatively settle the question on existence of a real-valued higher order spectral shift function for a pair of self-adjoint operators H and V such that…”
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On a Perturbation Determinant for Accumulative Operators
Published in Integral equations and operator theory (01-03-2015)“…For a purely imaginary sign-definite perturbation of a self-adjoint operator, we obtain exponential representations for the perturbation determinant in both…”
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