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Finite speed of disturbance for the nonlinear Schrödinger equation

Published online by Cambridge University Press:  27 December 2018

Simão Correia*
Affiliation:
CMAF-CIO and FCUL, Campo Grande, Edifício C6, Piso 2, 1749-016 Lisboa, Portugal (sfcorreia@fc.ul.pt)

Abstract

We consider the Cauchy problem for the nonlinear Schrödinger equation on the whole space. After introducing a weaker concept of finite speed of propagation, we show that the concatenation of initial data gives rise to solutions whose time of existence increases as one translates one of the initial data. Moreover, we show that, given global decaying solutions with initial data u0, v0, if |y| is large, then the concatenated initial data u0 + v0(· − y) gives rise to globally decaying solutions.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 2018 

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