Exponential may refer to any of several mathematical topics related to exponentiation, including: Exponential function, also: Matrix exponential, the matrix analogue to the above Exponential decay, decrease at a rate proportional to value Exponential discounting, a specific form of the discount function, used in the analysis of choice over time Exponential growth, where the growth rate of a mathematical function is proportional to the function's current value Exponential map (Riemannian geometry), in Riemannian geometry Exponential map (Lie theory), in Lie theory Exponential notation, also kno