On the zero-mass constraint for KP type equations
Seminar Room 1, Newton Institute
For a rather general class of equations of Kadomtsev-Petviashvili (KP) type, we prove that the zero-mass constraint (in x) is satisfied at any non zero time even if it is not satisfied at initial time zero. Our results are based on a precise analysis of the fundamental solution of the linear part and of its anti x-derivative.
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