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Energy asymptotics for the strongly damped Klein-Gordon equation (2205.04205v1)
Published 9 May 2022 in math.AP
Abstract: We consider the strongly damped Klein Gordon equation for defocusing nonlinearity and we study the asymptotic behaviour of the energy for periodic solutions. We prove first the exponential decay to zero for zero mean solutions. Then, we characterize the limit of the energy, when the time tends to infinity, for solutions with small enough initial data and we finally prove that such limit is not necessary zero.
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