The Last Mystery of Edgar Allan Poe: The Troy Dossier true to the character and known history of Poe. The plot concerns an attempt to overthrow the United States government. The novel is one of the earliest to engage the historical Edgar Allan Poe as a protagonist in a detective novel. Poe is considered to be the inventor of the classic tropes of detective fiction with his character C. Auguste Dupin, so it is natural that writers would utilize him in their fictions, especially given the recent rise of the historical novel. Many other writers have done this, including Louis Bayard in "The Pale Blue Eye" and true crime writer
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