Fictional detectives Fictional detectives Fictional detectives are characters in detective fiction. These characters have long been a staple of detective mystery crime fiction, particularly in detective novels and short stories. Much of early detective fiction was written during the "Golden Age of Detective Fiction" (1920s-1930s). These detectives include amateurs, private investigators and professional policemen. They are often popularized as individual characters rather than parts of the fictional work in which they appear. Stories involving individual detectives are well-suited to dramatic presentation, resulting in many popular theatre, television, and movie characters. The first famous detective in fiction was Edgar Allan Poe's C. Auguste
Dupin cyclide also used to refer to a more general class of quartic surfaces which are important in the theory of separation of variables for the Laplace equation in three dimensions. Dupin cyclides were investigated not only by Dupin, but also by A. Cayley und J.C. Maxwell. Today, Dupin cylides are used in computer-aided design (CAD), because cyclide patches have rational representations and are suitable for blending canal surfaces (cylinder, cones, tori, and others). There are several equivalent definitions of Dupin cyclides. In formula_1, they can be defined as the images under any inversion of tori, cylinders and double cones. This shows