A complex number is said to be hypertranscendental if it is not the value at an algebraic point of a function which is the solution of an algebraic differential equation with coefficients in
and with algebraic initial conditions.
[1] The term is related to transcendental numbers, which are numbers which are not a solution of a non-zero polynomial equation with rational coefficients.
is transcendental but not hypertranscendental, as it can be generated from the solution to the differential equation
This article about a number is a stub.