Competition of small targets in planar domains: from Dirichlet to Robin and Steklov boundary condition

Dirichlet-to-Neumann operator, Steklov problem, Diffusion-controlled reactions, Green's functions, 0, Diffusion, Matched asymptotics, Diffusion matched asymptotics narrow escape problem Steklov problem mixed boundary conditions diffusion-controlled reactions first-passage time Green's functions Dirichlet-to-Neumann operator