The asymptotic iteration method for the angular spheroidal eigenvalues   with arbitrary complex size parameter c
  The asymptotic iteration method is applied, to calculate the angular spheroidal eigenvalues $\lambda^{m}_{\ell}(c)$ with arbitrary complex size parameter $c$. It is shown that, the obtained numerical results of $\lambda^{m}_{\ell}(c)$ are all in excellent agreement with the available published data over the full range of parameter values $\ell$, $m$, and $c$. Some representative values of $\lambda^{m}_{\ell}(c)$ for large real $c$ are also given. 
T. Barakat, K. Abodayeh, B. Abdallah, and O. M. Al-Dossary