An Educational Path on the Concept of Infinite

This paper outlines an educational path on the concept of infinite, a fundamentalconcept in mathematics and in every scientific field of the human theoretical andapplied knowledge. After a historical premise, the paper focuses on the definition ofthis basic concept, as well as on the difference between potential infinite and actualinfinite. The concept of infinitesimal, linked to that of infinite, is underlined and some paradoxes of the infinite are considered. It follows information on the concept of transfinite. The non-technical but rigorous treatment allows the use of this work as an interesting educational introduction to one of the most important concepts that the human being has always dealt with.