Let $n,m\in\mathbb N$, let $\Omega\subset\mathbb R^n$ be a bounded [open set](/page/Open%20Set), and let $1<p<\infty$. Equip $\mathbb R^{m\times n}$ with the Frobenius norm
be continuous and quasiconvex in Morrey's sense: for every $A\in\mathbb R^{m\times n}$, every bounded open set $U\subset\mathbb R^n$ with $\mathcal L^n(U)>0$, and every $\varphi\in W^{1,\infty}_0(U;\mathbb R^m)$,