Invariant measure for a three dimensional nonlinear wave equation

Invariant measure for a three dimensional nonlinear wave equation
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三维非线性波动方程的不变测度

DOI:
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发表时间:
2007
期刊:
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通讯作者:
N. Tzvetkov
N. Tzvetkov
中科院分区:
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文献类型:
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作者:
N. Burq;N. Tzvetkov

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我们研究了三维球上亚临界(次立方)离焦非线性波动方程对于低规律性随机数据的长期行为。我们证明,对于 $cap_{s<1/2} H^s(B(0,1))$ 中的大量径向初始数据,方程(在时间上全局)是适定的,并且我们构造了一个不变测度。
We study the long time behavior of the subcritical (subcubic) defocussing nonlinear wave equation on the three dimensional ball, for random data of low regularity. We prove that for a large set of radial initial data in $cap_{s<1/2} H^s(B(0,1))$ the equation is (globally in time) well posed and we construct an invariant measure.