<p>I got one,</p>
<p>Derive a theorem to solve whether a PDE (partial diff eq), whose boundaries are given by R^n (dirichlet problem), is continuously differentiable within the interior, continuous on the boundary, and whose solution, if existing, is unique?</p>
<p>I bet none of you can do that... I mean cmon, only like some genius, siemens westinghouse winner could do that</p>