 Defocusing semilinear wave equation

ID: defocusing-semilinear-wave-equation

The defocusing power-type wave equation has the conserved nonnegative energy

E (u) = \int (\frac{∣ u _{t} ∣ ^{2} + ∣\nabla u ∣ ^{2}}{2} + \frac{∣ u ∣ ^{p + 1}}{p + 1}) d x .

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