Abstract
We examine the memorphic continuation of the cut-off resolvent R χ(z) = χ(U(T, 0) ∊ z)−1χ, χ(x) ∊ C ∞0 (ℝn), where U(t, s) is the propagator related to the wave equation with non-trapping time-periodic perturbations (potential V (t, x) or a periodically moving obstacle) and T > 0 is the period. Assuming that R χ(z) has no poles z with |z| ≥ 1, we establish a local energy decay and we obtain global Strichartz estimates. We discuss the case of trapping moving obstacles and we present some results and conjectures concerning the behavior of R χ(z) for |z| > 1.
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Petkov, V. (2006). Local energy decay and Strichartz estimates for the wave equation with time-periodic perturbations. In: Bove, A., Colombini, F., Del Santo, D. (eds) Phase Space Analysis of Partial Differential Equations. Progress in Nonlinear Differential Equations and Their Applications, vol 69. Birkhäuser Boston. https://doi.org/10.1007/978-0-8176-4521-2_14
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DOI: https://doi.org/10.1007/978-0-8176-4521-2_14
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