In this paper a rigorous mathematical proof is given of the so-called limiting amplitude principle for reflecting bodies. This principle states that every solution of the wave equation with a harmonic forcing term, uniformly on bounded sets as t tends to infinity. Here V satisfies the reduced wave
Positive resonances and the limiting amplitude principle
β Scribed by D. Eidus
- Publisher
- Springer
- Year
- 1986
- Tongue
- English
- Weight
- 113 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0377-9017
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β¦ Synopsis
We define the positive resonance points of self-adjoint operators without using the analytical continuation of corresponding resolvents and show that the limiting amplitude principle for the abstract wave equation does not take place in general, if m2 = 2, where co is the disturbing frequency and 2 is the resonance point. The asymptotics of corresponding solutions as t --, ~ are obtained, which imply the growth of the oscillation amplitude as t ~, 0 < fl < 1, or as In t, t ~ oo.
π SIMILAR VOLUMES
## Abstract We consider a nonstationary scattering of plane waves by a wedge. We prove that the Sommerfeldβtype integral, constructed in (__Math. Meth. Appl. Sci.__ 2005; **28**:147β183; __Proc. Int. Seminar__ β__Day on Diffractionβ2003__β, University of St. Petersburg, 2003; 151β162), is a classic