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arXiv 1106.0914math.AP
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1-共转能临界谐波热流的稳定爆破动力学

Stable blow up dynamics for the 1-corotational energy critical harmonic heat flow

Pierre Raphael, Remi Schweyer

摘要:

我们展示了一个稳定的有限时间爆破制度的1-共转能量临界谐波热流从$\Bbb R^2$到一个光滑的紧凑的旋转表面的$\Bbb R^3$减少到半线性抛物问题$$\partial_t u -\pa^2_{r} u-\frac{\pa_r u}{r} + \frac{f(u)}{r^2}=0$$的一个适当的功能类$f$。在能量临界拓扑中,相应的初始数据可以选择为光滑的、局域性好的、任意接近基态调和映射的数据。我们给出了相应的奇异性形成的尖锐渐近性,这种奇异性形成是通过以[Van den Bergh,J.; Hulshof,J.; King,J.,调和映射热流中鼓泡的形式渐近性,SIAM应用数学,第63卷,o 5。第1682-1717页]。我们的方法在于继续[Raphaël,P.;罗德年克希岛,临界共旋波映射和等变杨米尔斯问题的稳定爆破动力学,将出现在预备数学IHES。[Merle,F.; Raphaël,P.; Rodnianski,I.,Blow up dynamics for smooth solutions to the energy critical Schrodinger map,preprint 2011.]。

英文摘要:

We exhibit a stable finite time blow up regime for the 1-corotational energy critical harmonic heat flow from $\Bbb R^2$ into a smooth compact revolution surface of $\Bbb R^3$ which reduces to the semilinear parabolic problem $$\partial_t u -\pa^2_{r} u-\frac{\pa_r u}{r} + \frac{f(u)}{r^2}=0$$ for a suitable class of functions $f$. The corresponding initial data can be chosen smooth, well localized and arbitrarily close to the ground state harmonic map in the energy critical topology. We give sharp asymptotics on the corresponding singularity formation which occurs through the concentration of a universal bubble of energy at the speed predicted in [Van den Bergh, J.; Hulshof, J.; King, J., Formal asymptotics of bubbling in the harmonic map heat flow, SIAM J. Appl. Math. vol 63, o5. pp 1682-1717]. Our approach lies in the continuation of the study of the 1-equivariant energy critical wave map and Schrödinger map with $\Bbb S^2$ target in [Raphaël, P.; Rodnianksi, I., Stable blow up dynamics for the critical corotational wave maps and equivariant Yang Mills problems, to appear in Prep. Math. IHES.], [Merle, F.; Raphaël, P.; Rodnianski, I., Blow up dynamics for smooth solutions to the energy critical Schrödinger map, preprint 2011.].

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