Wave Equation for Operators with Discrete Spectrum and Irregular Propagation Speed
Wave Equation for Operators with Discrete Spectrum and Irregular Propagation Speed
复制标题
具有离散谱和不规则传播速度算子的波动方程
DOI:
10.1007/s00205-017-1152-x
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发表时间:
2017
影响因子:
2.5
通讯作者:
N. Tokmagambetov
中科院分区:
文献类型:
--
作者:
Michael Ruzhansky;N. Tokmagambetov
Given a Hilbert space $${\mathcal{H}}$$H, we investigate the well-posedness of the Cauchy problem for the wave equation for operators with a discrete non-negative spectrum acting on $${\mathcal{H}}$$H. We consider the cases when the time-dependent propagation speed is regular, Hölder, and distributional. We also consider cases when it is strictly positive (strictly hyperbolic case) and when it is non-negative (weakly hyperbolic case). When the propagation speed is a distribution, we introduce the notion of “very weak solutions” to the Cauchy problem. We show that the Cauchy problem for the wave equation with the distributional coefficient has a unique “very weak solution” in an appropriate sense, which coincides with classical or distributional solutions when the latter exist. Examples include the harmonic and anharmonic oscillators, the Landau Hamiltonian on $${\mathbb{R}^n}$$Rn, uniformly elliptic operators of different orders on domains, Hörmander’s sums of squares on compact Lie groups and compact manifolds, operators on manifolds with boundary, and many others.
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影响因子:
2.4
作者:
Claudia Garetto;Michael Ruzhansky
通讯作者:
Claudia Garetto;Michael Ruzhansky
影响因子:
2.5
作者:
Garetto C
通讯作者:
Garetto C
影响因子:
1
作者:
Inglis J
通讯作者:
Inglis J
DOI:
10.48550/arxiv.1208.1883
发表时间:
2012
期刊:
--
影响因子:
--
作者:
Dasgupta A
通讯作者:
Dasgupta A