(calculus) a type of differential equation in which the derivative of the unknown function at a certain time is given in terms of the values of the function at previous times

The difference between an observed value and a standard value assumed as true.

plural of absolute personal equation

a method used to estimate the parameters of a generalized linear model with a possible unknown correlation between outcomes

plural of Pell-Fermat equation

(fluid dynamics) A physical law that gives the pressure drop in an incompressible Newtonian fluid in laminar flow flowing through a long cylindrical pipe of constant cross section.

Synonym of Pell's equation

plural of net ionic equation

(chemistry) An ionic equation in which spectator ions are omitted, i.e. only the reacting ions are included in the equation.

(physics) A nonlinear partial differential equation that describes the capillary pressure difference sustained across the interface between two static fluids, such as water and air, due to the phenomenon of surface tension or wall tension.