Zadig approach instructive, and wrote in his 1880 article "On the Method of "Zadig"": Edgar Allan Poe may have been inspired by "Zadig" when he created C. Auguste Dupin in "The Murders in the Rue Morgue", which Poe called a "tale of ratiocination" and which established the modern detective fiction genre. Émile Gaboriau and Arthur Conan Doyle were perhaps also influenced by "Zadig". As Barzun and Taylor put it in "A Catalogue of Crime": "However implausible and "agrarian" his method, he is the first systematic detective in modern literature, and that priority itself adds to his troubles in the story until
Dupin cyclide Dupin cyclide In mathematics, a Dupin cyclide or cyclide of Dupin is any geometric inversion of a standard torus, cylinder or double cone. In particular, these latter are themselves examples of Dupin cyclides. They were discovered by (and named after) Charles Dupin in his 1803 dissertation under Gaspard Monge. The key property of a Dupin cyclide is that it is a channel surface (envelope of a one-parameter family of spheres) in two different ways. This property means that Dupin cyclides are natural objects in Lie sphere geometry. Dupin cyclides are often simply known as "cyclides", but the latter term is