Trace operator on H 1 ($\hat{I}\text{c◯}$) for general open bounded domains

Robert Eymard, Thierry Gallouët, David Maltese +1

In the case of any bounded open set $\hat{I}\text{c◯}$ $\subset$ R d with boundary $\partial$$\hat{I}\text{c◯}$, we first construct a directional trace in any direction $\hat{I}¸$ of the unit sphere, for any u $\in…