Definition:First Order Ordinary Differential Equation

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Definition

A first order ordinary differential equation is an ordinary differential equation in which any derivatives with respect to the independent variable have order no greater than $1$.


The general first order ODE can be written as:

$\map F {x, y, \dfrac {\ d y} {\ d x} }$

or, using prime notation:

$\map F {x, y, y'}$


If it is possible to do so, then it is often convenient to present such an equation in the form:

$\dfrac {\d y} {\d x} = \map f {x, y}$

that is:

$y' = \map f {x, y}$


Sources