| 概要 |
The aim of this talk is to present some energy estimates for Klein-Gordon equations with time-dependent mass. In dependence on the conditions on the mass term some results of generalized energy conservation and blow-up behavior of the energy for large times will be discussed. The starting point are statements about generalized energy conservation for a scale-invariant model case. Based on these results the influence of oscillations in interplay with a decreasing term will be investigated. Conclusively, there will follow some remarks about scattering results for Klein-Gordon equations with variable mass.
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