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Perturbation Of Spectra
(2017)
The main goal of this talk is to show that a small perturbation
of a self–adjoint operator H0, in a Hilbert space H, may drastically
change its spectrum.
In particular, we shall discuss the case of rank one perturbations,
H
Perturbed frame sequences: Canonical dual systems, approximate reconstructions and applications
(World Scientific, 2014-03)
We consider perturbation of frames and frame sequences in a Hilbert space. It is known that small perturbations of a frame give rise to another frame. We show that the canonical dual of the perturbed sequence is a perturbation ...
Random perturbations of stochastic processes with unbounded variable length memory
(UNIV WASHINGTON, DEPT MATHEMATICS, 2008)
We consider binary infinite order stochastic chains perturbed by a random noise. This means that at each time step, the value assumed by the chain can be randomly and independently flipped with a small fixed probability. ...
Stability of the curvature perturbation in dark sectors` mutual interacting models
(ELSEVIER SCIENCE BV, 2009)
We consider perturbations in a cosmological model with a small coupling between dark energy and dark matter. We prove that the stability of the curvature perturbation depends on the type of coupling between dark sectors. ...
Geometric Singular Perturbation Theory for Systems with Symmetry
(2020-01-01)
In this paper we focus on a class of symmetric vector fields in the context of singularly perturbed fast-slow dynamical systems. Our main question is to know how symmetry properties of a dynamical system are affected by ...
H-2 AND H-infinity PERFORMANCE OPTIMIZATION OF SINGULARLY PERTURBED SWITCHED SYSTEMS
(Siam PublicationsPhiladelphiaEUA, 2012)