@Article{JMS-53-402, author = {Case , Jeffrey S. and Wang , Yi}, title = {Towards a Fully Nonlinear Sharp Sobolev Trace Inequality}, journal = {Journal of Mathematical Study}, year = {2020}, volume = {53}, number = {4}, pages = {402--435}, abstract = {

We classify local minimizers of $\int\sigma_2+\oint H_2$ among all conformally flat metrics in the Euclidean $(n+1)$-ball, $n=4$ or $n=5$, for which the boundary has unit volume, subject to an ellipticity assumption. We also classify local minimizers of the analogous functional in the critical dimension $n+1=4$. If minimizers exist, this implies a fully nonlinear sharp Sobolev trace inequality. Our proof is an adaptation of the Frank-Lieb proof of the sharp Sobolev inequality, and in particular does not rely on symmetrization or Obata-type arguments.

}, issn = {2617-8702}, doi = {https://doi.org/10.4208/jms.v53n4.20.02}, url = {http://global-sci.org/intro/article_detail/jms/18508.html} }