Hausdorff measure of the free boundary for the $p$-obstacle problem with subcritical exponents

Jing Yu, Jun Zheng

This paper investigates a class of $p$-obstacle problems with subcritical exponents having the form \begin{align} \mathrm{div}\left( a(x)|\nabla u|^{p-2}\nabla u\right) =m_1χ_{\{u…