Approximation by mappings with singular Hessian minors

Zhuomin Liu, Jan Malý, Mohammad Reza Pakzad

Let $\Omega \subset {\mathbb{R}}^n$ be a Lipschitz domain. Given $1\le p<k\le n$ and any $u\in W^{2,p}(\Omega )$ belonging to the little Hölder class $c^{1,\alpha }$, we construct a sequence $u_j$ in…