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ModelODEEditor

In this editor systems of ordinary differential equations of first order are defined.

That means that a system of equations that contains second derivatives must be recast to a system of equations with only first derivatives. This demand is not restrictive, as any system of equations with second derivatives in it can expressed equivalently as a system of equations with only first derivatives, by introducing auxillary variables as needed.

The button 'Prelim' opens a panel for repeatedly occuring elements in the Evolution calculation. This feature is for making the calculations more efficient.

The 'Solver' selection combobox allows you to choose which of the solver algorithms provided by EJS you want to use to solve numerically the ODE.

The button 'Events' opens a panel for evaluating non-smooth changes in the evolution, such as a ball bouncing on a floor.

Este editor le permite definir sistemas de ecuaciones diferenciales ordinarias explícitas de primer orden. Es decir, aquellos en los que se expresa la primera derivada de una o más variables del modelo con una función explícita de ellas mismas y de las demás sin derivar. Que deban ser ecuaciones de primer orden no es restrictivo ya que cualquier sistema de ecuaciones de orden superior puede expresarse de forma equivalente como un sistema de ecuaciones de primer orden introduciendo las variables auxiliares necesarias. Puede ver un ejemplo de cómo definirlas en nuestro tutorial.