Variables
Defining the problem variables, we can first specify n, and after that the n dependent variables, testing if this number is not overpass or overflow. Also, we can take n as the current number of dependent variables.

In EpODE, we have take the first variant.

The name of a variable can be a letter or a letter followed by maximum two digits. For example, t, y, h, x1, y01, a82.

A comment about the source of the problem can be also given in the same dialog box in which the problem variables are enumerated.

Example for the system B1