Density of smooth functions in Musielak-Orlicz-Sobolev spaces $W^{k,\Phi }(\Omega )$

Anna Kaminśka, Mariusz Żyluk

We consider here Musielak-Orlicz Sobolev (MOS) spaces $W^{k,\Phi }(\Omega )$, where $\Omega$ is an open subset of ${\mathbb{R}}^d$, $k\in \mathbb{N}$ and $\Phi$ is a Musielak-Orlicz function. The main…