On the problem of unique continuation for the p-Laplace equation
  We study if two different solutions of the $p$-Laplace equation $$\nabla\cdot(|\nabla u|^{p-2}\nabla u)=0,$$ where $1<p<\infty$, can coincide in an open subset of their common domain of definition. We obtain some partial results on this interesting problem. 
Seppo Granlund and Niko Marola
math.AP