2 problems

Let $n$, $\alpha$, $p$, $q$, $\sigma_1$, and $\sigma_2$ be parameters, and consider the Wolff-type integral system … . A positive solution is a solution whose components are positi…

Let $d$ be the ambient dimension, let $s$ be an integer with $1\leq s\leq d$, and let $\Sigma_\varphi$ be the class of nonnegative Borel measures $\mu$ on $\mathbb R^d$ satisfying…