Eugène François Vidocq the first scientific and methodical investigators who played the lead role in many adventures, who in turn was a major influence for the creation of Sherlock Holmes. It is also believed that Edgar Allan Poe was prompted by a story about Vidocq to create the first detective in fiction, C. Auguste Dupin, who appeared, for example, in the short story "The Murders in the Rue Morgue", which is considered the first detective story. Vidocq is also mentioned in "Moby Dick" ("Chapter 88: Schools and Schoolmasters") and "White Jacket" ("Chapter VI: The Quarterdeck Officers,etc.") by Herman Melville and "Great Expectations" by
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