org.apache.commons.math3.analysis
Interfaces 
BivariateFunction
DifferentiableMultivariateFunction
DifferentiableMultivariateVectorFunction
DifferentiableUnivariateFunction
DifferentiableUnivariateMatrixFunction
DifferentiableUnivariateVectorFunction
MultivariateFunction
MultivariateMatrixFunction
MultivariateVectorFunction
ParametricUnivariateFunction
TrivariateFunction
UnivariateFunction
UnivariateMatrixFunction
UnivariateVectorFunction
Classes 
FunctionUtils