Either of a pair of first-order nonlinear differential equations that are frequently used to describe the dynamics of biological systems in which two species interact, one as a predator and the other as prey.

plural of stochastic differential equation

plural of delay differential equation

(calculus) a type of differential equation in which one or more of the terms is a stochastic process resulting in a solution which is itself a stochastic process

(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.