Also called the Gelfond-Schneider Theorem. is Transcendental if
See also Algebraic Number, Hilbert's Problems, Irrational Number, Transcendental Number
References
Baker, A. Transcendental Number Theory. London: Cambridge University Press, 1990.
Courant, R. and Robbins, H. What is Mathematics?: An Elementary Approach to Ideas and Methods, 2nd ed.
Oxford, England: Oxford University Press, p. 107, 1996.