
Differential Equation  Britannica
Mathematical statement containing one or more derivatives that is, terms representing the rates of change of continuously varying quantities.
http://www.britannica.com/topic/differentialequation

Stiff Differential Equations  Math Works
Stiffness is a subtle, difficult, and important  concept in the numerical solution of ordinary differential equations.
http://www.mathworks.com/company/newsletters/articles/stiffdifferentialequations.html

Differential Equations For Dummies Cheat Sheet
The most common classification of differential equations is based on order. The order of a differential equation simply is the order of its highest derivative. You can have first, second, and higherorder differential equations.
http://www.dummies.com/howto/content/differentialequationsfordummiescheatsheet.html

Differential Equations  Introduction
Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K12 kids, teachers and parents.
https://www.mathsisfun.com/calculus/differentialequations.html

An Introduction to Ordinary Differential Equations  Math In Sight
An introduction using simple examples explaining what an ordinary differential equation is and how one might solve them.
http://mathinsight.org/ordinary_differential_equation_introduction

Differential Equation Introduction  Khan Academy
A video from Khan Academy that shows the differential equation.
https://www.khanacademy.org/math/differentialequations/firstorderdifferentialequations/differentialequationsintro/v/differentialequationintroduction

What is a Differential Equation  YouTube
What a differential equation is and some terminology.
https://www.youtube.com/watch?v=_POEWfygmU

Ordinary Differential Equation
Ordinary Differential Equation  from Wolfram Math World.
http://mathworld.wolfram.com/OrdinaryDifferentialEquation.html

Differential Equation  Wikipedia
A differential equation is a mathematical equation that relates some function with its derivatives.
https://en.wikipedia.org/wiki/Differential_equation

Differential Equations  Khan Academy
Differential equations, Separable equations, exact equations, integrating factors and Homogeneous equation information.
https://www.khanacademy.org/math/differentialequations