Results 31 to 40 of about 238,303 (293)
Journal of Inequalities and Applications, 2022 We provide upper bounds on the perturbation of invariant subspaces of normal matrices measured using a metric on the space of vector subspaces of C n $\mathbb{C}^{n}$ in terms of the spectrum of both unperturbed and perturbed matrices as well as the ...
Subhrajit Bhattacharya
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Perturbative c-theorem in d-dimensions [PDF]
Journal of High Energy Physics, 2013 26 pages.
openaire +3 more sources
Invertibility of random matrices: unitary and orthogonal perturbations [PDF]
, 2013 We show that a perturbation of any fixed square matrix D by a random unitary matrix is well invertible with high probability. A similar result holds for perturbations by random orthogonal matrices; the only notable exception is when D is close to ...
Rudelson, Mark, Vershynin, Roman
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On Perturbations of Generators of C0-Semigroups
Abstract and Applied Analysis, 2014 We present a perturbation result for generators of C0-semigroups which can be considered as an operator theoretic version of the Weiss-Staffans perturbation theorem for abstract linear systems.
Martin Adler +2 more
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The Nagaev-Guivarc'h method via the Keller-Liverani theorem [PDF]
, 2010 The Nagaev-Guivarc'h method, via the perturbation operator theorem of Keller and Liverani, has been exploited in recent papers to establish local limit and Berry-Essen type theorems for unbounded functionals of strongly ergodic Markov chains.
Hervé, Loïc, Pène, Françoise
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Variational perturbation approach to the Coulomb electron gas
, 2002 The efficiency of the variational perturbation theory [Phys. Rev. C {\bf 62}, 045503 (2000)] formulated recently for many-particle systems is examined by calculating the ground state correlation energy of the 3D electron gas with the Coulomb interaction.
Bachmann M +24 more
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Mixed semicontinuous perturbation of a second order nonconvex sweeping process
Electronic Journal of Qualitative Theory of Differential Equations, 2008 We prove a theorem on the existence of solutions of a second order differential inclusion governed by a class of nonconvex sweeping process with a mixed semicontinuous perturbation.
D. Azzam-Laouir
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KAM theory in configuration space and cancellations in the Lindstedt series
, 2009 The KAM theorem for analytic quasi-integrable anisochronous Hamiltonian systems yields that the perturbation expansion (Lindstedt series) for quasi-periodic solutions with Diophantine frequency vector converges.
Corsi, Livia +2 more
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Constraining Higher Derivative Supergravity with Scattering Amplitudes [PDF]
, 2015 We study supersymmetry constraints on higher derivative deformations of type IIB supergravity by consideration of superamplitudes. Combining constraints of on-shell supervertices and basic results from string perturbation theory, we give a simple ...
Wang, Yifan, Yin, Xi
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A Fold Bifurcation Theorem of Degenerate Solutions in a Perturbed Nonlinear Equation
Abstract and Applied Analysis, 2011 We consider a nonlinear equation F(ε,λ,u)=0, where the parameter ε is a perturbation parameter, F is a differentiable mapping from R×R×X to Y, and X, Y are Banach spaces.
Ping Liu, Yuwen Wang
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