 A more general framework where the term exponential polynomial may be found is that of exponential functions on abelian groups.Similarly to how exponential functions on exponential fields are defined, given a topological abelian group "G" a homomorphism from "G" to the additive group of the complex numbers is called an additive function, and a homomorphism to the multiplicative group of nonzero complex numbers is called an exponential function, or simply an exponential.A product of additive functions and exponentials is called an exponential monomial, and a linear combination of these is then an exponential polynomial on "G".