2 problems

Let $m\ge2$ small spherical targets have radii $\varepsilon r_0,\dots,\varepsilon r_{m-1}$ in a bounded three-dimensional reflecting domain, and let $K_N$ be the index of the targe…

Let $M\subset\mathbb{R}^3$ be a bounded domain with reflecting boundary, and let $V_k$ be small spherical targets centered at $v_k$ with radii $\varepsilon r_k$, where the starting…