This means it is a differential equation of the same order in space and time.

The field, as determined by differential equations, takes the place of the force.

There's a lot more, including a page or so of differential equations, but that's the general idea.

The differential equation can be solved using a different approach.

For example, the solution of a differential equation is a function.

They were among the first partial differential equations to be written down.

Let us consider an example of a first order partial differential equation.

This is a famous result from the theory of differential equations.

Sometimes, something in the world will obey several differential equations at the same time.

In those days, he was one of the greatest experts for differential equations.