Ordinary Differential Equations
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- An Ordinary Differential Equations (ODE) is a differential equation that involves a single independant variable and its derivatives.

- The order of a ODE is define as the order of the highest derivative that occurs in the equation.

`Original Source <https://byjus.com/maths/ordinary-differential-equations/>`__

.. note::
   When working with differential equations with often use the Lagrange's notation (see :doc:`notations`).