Hilbert’s Seventh Problem

Irrationality and Transcendence of Certain Numbers: Is a^b transcendental, for algebraic a ≠ 0,1 and irrational algebraic b

A number is called algebraic if it can be the zero of a polynomial with rational coefficients. For example, 2 is a zero of the polynomial x − 2, and √2 is a zero of the polynomial x² − 2. Algebraic numbers can be either rational or irrational; transcendental numbers like π are irrational numbers that are not algebraic. Hilbert’s seventh problem concerns powers of algebraic numbers. Consider the expression a^b, where a is an algebraic number other than 0 or 1 and b is an irrational algebraic number. Must a^b be transcendental? In 1934, Aleksandr Gelfond showed that the answer is yes.

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