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Singular perturbations and scaling [PDF]

open access: yesDiscrete & Continuous Dynamical Systems - B, 2018
Scaling transformations involving a small parameter ({\em degenerate scalings}) are frequently used for ordinary differential equations that model (bio-) chemical reaction networks.
Lax, Christian, Walcher, Sebastian
core   +5 more sources

Singular perturbations and a theorem of Kisyński [PDF]

open access: greenJournal of Mathematical Analysis and Applications, 1965
Peer Reviewed ; http://deepblue.lib.umich.edu/bitstream/2027.42/31989/1/0000031 ...
Joel Smoller
openalex   +4 more sources

Singular perturbations and singular arcs--Part I [PDF]

open access: greenIEEE Transactions on Automatic Control, 1975
Singular perturbation theory is applied to obtain the asymptotic solution for the nearly singular optimal control of a constant linear system on a finite time interval. In the limit as the control cost is reduced to zero, the initial control is found to have an impulse-like behavior, while the outer solution agrees asymptotically with the familiar ...
Robert E. O’Malley, A. Jameson
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Singular Perturbations and Nonstandard Analysis [PDF]

open access: bronzeTransactions of the American Mathematical Society, 1979
We study by methods of nonstandard analysis second order differential operators with zero order coefficients which are too singular to be defined by standard functions. In particular we study perturbations of the Laplacian in R 3 {R^3} given by potentials of the form λ
S. Albeverio   +2 more
openalex   +2 more sources

On a class of singular perturbation problems

open access: bronzeJournal of Mathematical Analysis and Applications, 1964
occurs in the theory of small transverse deflections of stretched thin elastic plates. Here U(X, y) is the deflection of the midplane of the plate, Au = u,, + uyy , and differentiation is indicated by subscripts. In the situation of interest, X is assumed large; it depends on the tension in the plate, the plate thickness, and certain material constants.
Jonathan C. Knowles, R.E. Messick
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Topics in singular perturbations

open access: bronzeAdvances in Mathematics, 1968
Robert E. O’Malley
openalex   +3 more sources

On singular perturbations in variational inequalities

open access: bronzeJournal of Mathematical Analysis and Applications, 1983
AbstractThe convergence of the optimal cost of a stopping time problem uε as ε ↓ 0 is studied. An estimate of the rate of convergence when uε → 0 is given. Some properties of the optimal stopping times \̂gqε are also given.
O. Bennouna
openalex   +5 more sources

Singular Perturbations, Regularization and Extension Theory

open access: green, 1994
We present an abstract result on removing regularization for singular potentials which are not semibounded from below. The relation between ``right'' regularizations and ``right'' self-adjoint extensions of the perturbed Schr\"odinger operators is ...
Hagen Neidhardt, Valentin A. Zagrebnov
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Singular Perturbations on the Infinite Interval [PDF]

open access: bronzeTransactions of the American Mathematical Society, 1966
Frank C. Hoppensteadt
openalex   +3 more sources

Singular perturbations of Cauchy's problem

open access: bronzeJournal of Mathematical Analysis and Applications, 1968
Bertrand Latil
openalex   +3 more sources

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