2 problems

Let $Z\subset\mathbb{R}^{3}$ be a quadratic harmonic cone, and let $\mathcal{H}(Z)$ denote the family of harmonic functions on the unit ball vanishing on $Z$. Agranovsky–Krasnov's…

Let $f$ be a nonzero compactly supported distribution or continuous function on $\mathbb R^3$ whose relevant support boundary is real analytic, strictly convex, and closed, and let…