Occult detective fiction Occult detective fiction Occult detective fiction combines the tropes of detective fiction with those of supernatural horror fiction. Unlike the traditional detective, the occult detective is employed in cases involving ghosts, curses, and other supernatural elements. Some occult detectives are portrayed as being themselves psychic or in possession of other paranormal powers. Edgar Allan Poe wrote three stories featuring a detective involved with the occult named C. Auguste Dupin, starting with "The Murders in the Rue Morgue" which was first published in 1841. Fitz James O’Brien’s character Harry Escott is another contender for first occult detective in fiction. A specialist
Dupin cyclide "R" are a 3-dimensional vectors, and "A" and "B" are constants. Families of cyclides give rise to various cyclidic coordinate geometries. In Maxime Bôcher's 1891 dissertation, "Ueber die Reihenentwickelungen der Potentialtheorie", it was shown that the Laplace equation in three variables can be solved using separation of variables in 17 conformally distinct quadric and cyclidic coordinate geometries. Many other cyclidic geometries can be obtained by studying R-separation of variables for the Laplace equation. 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