In a Taylor series, the convergence/divergence behavior at the boundary case $|x-x_0|=R$ is not immediately determinable.
If I understand correctly, such distribution of convergence and divergence over the spherical shell can be thought as $S^n\mapsto \hat{\mathbb{C}}$, and this distribution is a function of the original function for which the Taylor series was defined. Is there an extended study done on this subject?