On existence and nonexistence of isoperimetric inequality with differents monomial weights

Abstract

We consider the monomial weight $x^{A}=\vert x_{1}\vert^{a_{1}}\ldots\vert x_{N}\vert^{a_{N}}$, where $a_{i}$ is a nonnegative real number for each $i\in\{1,\ldots,N\}$, and we establish the existence and nonexistence of isoperimetric inequalities with different monomial weights. We study positive minimizers of $\int_{\partial\Omega}x^{A}\mathcal{H}^{N-1}(x)$ among all smooth bounded sets $\Omega$ in $\mathbb{R}^{N}$ with fixed Lebesgue measure with monomial weight $\int_{\Omega}x^{B}dx$.