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arxiv: 1602.08617 · v4 · pith:K3PNQDWAnew · submitted 2016-02-27 · 🧮 math.AP

Blow-up solutions for L²-supercritical gKdV equations with exactly k blow-up points

classification 🧮 math.AP
keywords blow-upequationsgkdvsolutionssupercriticalpointsslightlyvarepsilon
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In this paper we consider the slightly $L^2$-supercritical gKdV equations $\partial_t u+(u_{xx}+u|u|^{p-1})_x=0$, with the nonlinearity $5<p<5+\varepsilon$ and $0<\varepsilon\ll 1$ . In the previous work of the author we know that there exists an stable self-similar blow-up dynamics for slightly $L^2$-supercritical gKdV equations. Such solution can be viewed as solutions with single blow-up point. In this paper we will prove the existence of solutions with multiple blow-up points, and give a description of the formation of the singularity near the blow-up time.

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