function equation approach
implicit function equation
linearization function equation
optimal function equation
spline function equation
algebraic functional equation
auxiliary equation of hyperbolic function type
Cauchy functional equation
composition probability density function transport equation model
cubic functional equation
d’Alembert functional equation
damped functional differential equation
differential functional equation
Discontinuous functional differential equation
double distribution function lattice boltzmann equation
equal arc length geodesic distance function
equal efficiency production function