On ${\mathrm{B}\mathrm{V}}^{\mathbb{A}}$-Minimisers in two Dimensions

We investigate into the regularity of ${\mathrm{B}\mathrm{V}}^{\mathbb{A}}$-minimisers for $\mathbb{C}$-elliptic differential operators $\mathbb{A}$ in $2$ dimensions. Our studies strongly rely on the special structure of such differential operators. The gradient integrability is established for the sharp ellipticity range known from the (symmetric) gradient case.