Expressions of the form
See also Continued Fraction, Herschfeld's Convergence Theorem, Nested Radical, Square Root
References
Herschfeld, A. ``On Infinite Radicals.'' Amer. Math. Monthly 42, 419-429, 1935.
Pólya, G. and Szegö, G. Problems and Theorems in Analysis, Vol. 1. New York: Springer-Verlag, 1997.
Sizer, W. S. ``Continued Roots.'' Math. Mag. 59, 23-27, 1986.