The course is devoted to a short overview on ordinary differential questions in applications.

In particular, the following subjects will be covered:

• Linear Ordinary differential equations with the constant coefficients;
• Linear Ordinary, differential questions with continuous coefficients.

The solution methods covered are:

• Characteristic polynomial
• Frobenius method

The course closes with some ideas on  perturbation techniques in the case when a small parameter appears in the considerate ordinary differential question under investigation.