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arXiv 1405.2126math.AP
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尖点曲面上的Escherichartz不等式

Strichartz inequalities on surfaces with cusps

Jean-Marc Bouclet

摘要:

本文证明了非紧曲面上的波动方程和薛定谔方程在有限面积端点上的Schr hartz不等式,即端点等距于$ \big( (r_0,\infty) \times {\mathbb S}^1 , dr^2 + e^{- 2 ϕ(r)}d θ^2 \big) $且$ e^{-ϕ} $可积.我们首先证明,所有的Eschenhartz估计,任何衍生损失,不为真,在这样的目的。接下来,我们证明了波动方程,通过从$ {\mathbb S}^1 $的零模投影,我们恢复了与$ {\mathbb R}^2 $相同的不等式。另一方面,对于薛定谔方程,我们证明了,即使通过投影的零角模式,我们必须考虑额外的损失相比,闭曲面的情况下,衍生物,特别是,我们表明,半经典的估计布尔格-热拉尔-茨维特科夫不持有这样的几何形状。此外,我们的半经典估计与损失是尖锐的。

英文摘要:

We prove Strichartz inequalities for the wave and Schrödinger equations on noncompact surfaces with ends of finite area, i.e. with ends isometric to $ \big( (r_0,\infty) \times {\mathbb S}^1 , dr^2 + e^{- 2 ϕ(r)}d θ^2 \big) $ with $ e^{-ϕ} $ integrable. We prove first that all Strichartz estimates, with any derivative loss, fail to be true in such ends. We next show for the wave equation that, by projecting off the zero mode of $ {\mathbb S}^1 $, we recover the same inequalities as on $ {\mathbb R}^2 $. On the other hand, for the Schrödinger equation, we prove that even by projecting off the zero angular modes we have to consider additional losses of derivatives compared to the case of closed surfaces; in particular, we show that the semiclassical estimates of Burq-Gérard-Tzvetkov do not hold in such geometries. Moreover our semiclassical estimates with loss are sharp.

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