
What is a Delay Differential Equation?A Delay Differential Equation (or DDE) is a differential equation in which the derivative of the function in one instant of time depends on the value of the function in previous instants. In mathematical terms, where .
EJS can only solve DDEs with delays that are both discrete and constant. That is, equations of the form: where remain constant while the DDE is being solved. (Though they can change value if the DDE is conveniently reinitialized. That is, you can associate the delays with a variable, but you need to reset the solver if you change the value of this variable.)
So, for instance, EJS:
But, if EJS can solve your DDE, then you can expect all the goodies you are familiar with for ODEs:
