Abstract
Jean Le Rond d'Alembert, is a mathematician, physicist, astronomer, philosopher and especially French encyclopedist, born on 16 November 1717 in Paris. He became famous thanks to his work on the Encyclopédie (a major work of the eighteenth century), the first volume of which appeared in 1751, after five years of work by over two hundred contributors.
D'Alembert has the honor to introduce it by the famous Discours préliminaire. Nevertheless, his name is related to research in mathematics for which he is exceptionally talented already during his studies at the Jansenist college.
Member of several European academies, perpetual secretary of the French Academy, d'Alembert didn't stop his scientific work until his death at the age of sixty-six in 1783