%0 Journal Article %T The $p$-Faber-Krahn Inequality Noted %A Jie Xiao %J Mathematics %D 2009 %I arXiv %X When revisiting the Faber-Krahn inequality for the principal $p$-Laplacian eigenvalue of a bounded open set in $\mathbb R^n$ with smooth boundary, we simply rename it as the $p$-Faber-Krahn inequality and interestingly find that this inequality may be improved but also characterized through Maz'ya's capacity method, the Euclidean volume, the Sobolev type inequality and Moser-Trudinger's inequality. %U http://arxiv.org/abs/0903.1343v4