Le Petit Hans Freud

‘rediscovery’ of the Leibnizian algorithm (Roero 1989, p. 142). Instructed by Johann, in 1696 the Marquis de l’Hôpital produced what might have seemed impossible 10 years earlier, an ‘elementary’ introduction to the theory, the Analyse des infiniment petits, pour l’intelligence des lignes courbes.10 In this admirable book, the student can with relative ease learn both how the calculus works and why it works. A certain amount of what, in terms of all previous mathematical practice, would be considered