Quarterly of Applied Mathematics, Vol. 60, No. 3 (September 2002), pp. 589-599 (11 pages) Alternative expressions for calculating the prolate spheroidal radial ...
Let $f(z)$ be an entire function of positive and finite order $\mu$. If $f(z)$ has a finite number of Borel directions of order $\geq \mu$, then the sum of numbers of ...