A Vector Field Method on the Distorted Fourier Side and Decay for Wave Equations with Potentials(Memoirs of the American Mathematical Society)

势波方程用变形傅里叶边与衰退矢量场方法(丛书)

数学分析

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出版时间
2016年04月30日
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平装
ISBN
9781470418731
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页      码
80
语      种
英文
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图书简介
The authors study the Cauchy problem for the one-dimensional wave equation $$partial_t^2 u(t,x)-partial_x^2 u(t,x)+V(x)u(t,x)=0.$$ The potential $V$ is assumed to be smooth with asymptotic behavior $$V(x)sim -tfrac14 |x|^{-2}mbox{ as } |x|to infty.$$ They derive dispersive estimates, energy estimates, and estimates involving the scaling vector field $tpartial_t+xpartial_x$, where the latter are obtained by employing a vector field method on the ``distorted’’ Fourier side. In addition, they prove local energy decay estimates. Their results have immediate applications in the context of geometric evolution problems. The theory developed in this paper is fundamental for the proof of the co-dimension 1 stability of the catenoid under the vanishing mean curvature flow in Minkowski space; see Donninger, Krieger, Szeftel, and Wong, ``Codimension one stability of the catenoid under the vanishing mean curvature flow in Minkowski space’’, preprint arXiv:1310.5606 (2013).
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