A note on the degeneracy of convex solutions to monge amperé equation

A note on the degeneracy of convex solutions to monge amperé equation
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关于蒙日安培方程凸解简并性的注记

DOI:
10.1080/03605309308820970
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发表时间:
1993
影响因子:
1.9
通讯作者:
L. Caffarelli
L. Caffarelli
中科院分区:
数学2区
文献类型:
--
作者:
L. Caffarelli

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首先是二维证明:在这种情况下,我们必须证明S不是1。假设它是,即有一个部分沿着其中U 0-。在(2,y)坐标中,假设线段(x= 0,lyl< 1)。对于任何h> 0 n7 e,有C< det'I2 D2 u 5 hU,,+ $ Uy,,。由于U是局部Lipschitz,因此我们有lUyl< CIxI远离U的定义域的边界,比如在B1 p上。
First a two dimensional proof: In this case, we must show that S is not one. Suppose it is, ie there is a segment along which U 0-. In (2, y) coordinates, say the segment {x= 0, lyl< 1). For any h> 0 n7e have C< det'I2 D2u 5 hU,,+ $ Uy,. Since U is locally Lipschitz, we have and hence lUyl< CIxI away from the boundary of the domain of definition of U, say on B1p.