Mystery film include "The Gold Bug" (1910), also from France, and "The Murders in the Rue Morgue" (1914). Both are derived from stories by Edgar Allan Poe, which is appropriate as Poe is often credited with creating modern detective fiction as well as the first private detective character, C. Auguste Dupin. Universal Pictures renamed him Pierre Dupin in "Murders in the Rue Morgue" (1932), an atmospheric horror-mystery starring Bela Lugosi. The film was remade twice more in 1953 and 1971. Poe's second Dupin story, "The Mystery of Marie Rogêt", was filmed in 1942. More recently, "The Raven" (2012) presented a fictionalized account
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