Shell structure as solution to a free boundary problem from block copolymer morphology

A shell like structure is sought as a solution of a free boundary problem derived from the Ohta-Kawasaki theory of diblock copolymers. The boundary of the shell satisfies an equation that involves its mean curvature and the location of the entire shell. A variant of Lyapunov-Schmidt reduction process is performed that rigorously reduces the free boundary problem to a finite dimensional problem. The finite dimensional problem is solved numerically. The problem has two parameters: a and °. When a is small, there are a lower bound and a sequence such that if ° is greater than the lower bound and stays away from the sequence, there is a shell like solution.