Linear Dynamical Systems On Hilbert Spaces Typical Properties And Explicit Examples
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Linear Dynamical Systems On Hilbert Spaces Typical Properties And Explicit Examples
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Author : S. Grivaux
language : en
Publisher: American Mathematical Soc.
Release Date : 2021-06-21
Linear Dynamical Systems On Hilbert Spaces Typical Properties And Explicit Examples written by S. Grivaux and has been published by American Mathematical Soc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-06-21 with Education categories.
We solve a number of questions pertaining to the dynamics of linear operators on Hilbert spaces, sometimes by using Baire category arguments and sometimes by constructing explicit examples. In particular, we prove the following results. (i) A typical hypercyclic operator is not topologically mixing, has no eigen-values and admits no non-trivial invariant measure, but is densely distri-butionally chaotic. (ii) A typical upper-triangular operator with coefficients of modulus 1 on the diagonal is ergodic in the Gaussian sense, whereas a typical operator of the form “diagonal with coefficients of modulus 1 on the diagonal plus backward unilateral weighted shift” is ergodic but has only countably many unimodular eigenvalues; in particular, it is ergodic but not ergodic in the Gaussian sense. (iii) There exist Hilbert space operators which are chaotic and U-frequently hypercyclic but not frequently hypercyclic, Hilbert space operators which are chaotic and frequently hypercyclic but not ergodic, and Hilbert space operators which are chaotic and topologically mixing but not U-frequently hypercyclic. We complement our results by investigating the descriptive complexity of some natural classes of operators defined by dynamical properties.
Asymptotic Counting In Conformal Dynamical Systems
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Author : Mark Pollicott
language : en
Publisher: American Mathematical Society
Release Date : 2021-09-24
Asymptotic Counting In Conformal Dynamical Systems written by Mark Pollicott and has been published by American Mathematical Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-24 with Mathematics categories.
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Hardy Littlewood And Ulyanov Inequalities
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Author : Yurii Kolomoitsev
language : en
Publisher: American Mathematical Society
Release Date : 2021-09-24
Hardy Littlewood And Ulyanov Inequalities written by Yurii Kolomoitsev and has been published by American Mathematical Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-24 with Mathematics categories.
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The Mathematical Legacy Of Victor Lomonosov
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Author : Richard M. Aron
language : en
Publisher: Walter de Gruyter GmbH & Co KG
Release Date : 2020-08-10
The Mathematical Legacy Of Victor Lomonosov written by Richard M. Aron and has been published by Walter de Gruyter GmbH & Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08-10 with Mathematics categories.
The fundamental contributions made by the late Victor Lomonosov in several areas of analysis are revisited in this book, in particular, by presenting new results and future directions from world-recognized specialists in the field. The invariant subspace problem, Burnside’s theorem, and the Bishop-Phelps theorem are discussed in detail. This volume is an essential reference to both researchers and graduate students in mathematical analysis.
Cohomological Tensor Functors On Representations Of The General Linear Supergroup
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Author : Thorsten Heidersdorf
language : en
Publisher: American Mathematical Soc.
Release Date : 2021-07-21
Cohomological Tensor Functors On Representations Of The General Linear Supergroup written by Thorsten Heidersdorf and has been published by American Mathematical Soc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-21 with Education categories.
We define and study cohomological tensor functors from the category Tn of finite-dimensional representations of the supergroup Gl(n|n) into Tn−r for 0 < r ≤ n. In the case DS : Tn → Tn−1 we prove a formula DS(L) = ΠniLi for the image of an arbitrary irreducible representation. In particular DS(L) is semisimple and multiplicity free. We derive a few applications of this theorem such as the degeneration of certain spectral sequences and a formula for the modified superdimension of an irreducible representation.
Hamiltonian Perturbation Theory For Ultra Differentiable Functions
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Author : Abed Bounemoura
language : en
Publisher: American Mathematical Soc.
Release Date : 2021-07-21
Hamiltonian Perturbation Theory For Ultra Differentiable Functions written by Abed Bounemoura and has been published by American Mathematical Soc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-21 with Education categories.
Some scales of spaces of ultra-differentiable functions are introduced, having good stability properties with respect to infinitely many derivatives and compositions. They are well-suited for solving non-linear functional equations by means of hard implicit function theorems. They comprise Gevrey functions and thus, as a limiting case, analytic functions. Using majorizing series, we manage to characterize them in terms of a real sequence M bounding the growth of derivatives. In this functional setting, we prove two fundamental results of Hamiltonian perturbation theory: the invariant torus theorem, where the invariant torus remains ultra-differentiable under the assumption that its frequency satisfies some arithmetic condition which we call BRM, and which generalizes the Bruno-R¨ussmann condition; and Nekhoroshev’s theorem, where the stability time depends on the ultra-differentiable class of the pertubation, through the same sequence M. Our proof uses periodic averaging, while a substitute for the analyticity width allows us to bypass analytic smoothing. We also prove converse statements on the destruction of invariant tori and on the existence of diffusing orbits with ultra-differentiable perturbations, by respectively mimicking a construction of Bessi (in the analytic category) and MarcoSauzin (in the Gevrey non-analytic category). When the perturbation space satisfies some additional condition (we then call it matching), we manage to narrow the gap between stability hypotheses (e.g. the BRM condition) and instability hypotheses, thus circumbscribing the stability threshold. The formulas relating the growth M of derivatives of the perturbation on the one hand, and the arithmetics of robust frequencies or the stability time on the other hand, bring light to the competition between stability properties of nearly integrable systems and the distance to integrability. Due to our method of proof using width of regularity as a regularizing parameter, these formulas are closer to optimal as the the regularity tends to analyticity
Decoupling On The Wiener Space Related Besov Spaces And Applications To Bsdes
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Author : Stefan Geiss
language : en
Publisher: American Mathematical Society
Release Date : 2021-11-16
Decoupling On The Wiener Space Related Besov Spaces And Applications To Bsdes written by Stefan Geiss and has been published by American Mathematical Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-16 with Mathematics categories.
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Ergodicity Of Markov Processes Via Nonstandard Analysis
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Author : Haosui Duanmu
language : en
Publisher: American Mathematical Society
Release Date : 2021-12-09
Ergodicity Of Markov Processes Via Nonstandard Analysis written by Haosui Duanmu and has been published by American Mathematical Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-09 with Mathematics categories.
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Abelian Networks Iv Dynamics Of Nonhalting Networks
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Author : Swee Hong Chan
language : en
Publisher: American Mathematical Society
Release Date : 2022-04-08
Abelian Networks Iv Dynamics Of Nonhalting Networks written by Swee Hong Chan and has been published by American Mathematical Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-08 with Mathematics categories.
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Existence Of Unimodular Triangulations Positive Results
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Author : Christian Haase
language : en
Publisher: American Mathematical Soc.
Release Date : 2021-07-21
Existence Of Unimodular Triangulations Positive Results written by Christian Haase and has been published by American Mathematical Soc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-21 with Education categories.
Unimodular triangulations of lattice polytopes arise in algebraic geometry, commutative algebra, integer programming and, of course, combinatorics. In this article, we review several classes of polytopes that do have unimodular triangulations and constructions that preserve their existence. We include, in particular, the first effective proof of the classical result by Knudsen-Mumford-Waterman stating that every lattice polytope has a dilation that admits a unimodular triangulation. Our proof yields an explicit (although doubly exponential) bound for the dilation factor.