Sherlock Holmes in the Great Murder Mystery Sherlock Holmes in the Great Murder Mystery Sherlock Holmes in the Great Murder Mystery is a 1908 American silent film directed by an unknown director. The film was released on 27 November 1908 and is an adaptation of Edgar Allan Poe's short story "The Murders in the Rue Morgue" (1841), which is considered the first detective story, though the plot was altered to include Arthur Conan Doyle's detective Sherlock Holmes instead of Poe's C. Auguste Dupin. Dr. Watson makes his film debut here, though the actors playing Holmes and Watson are unknown, as the rest of the cast. It is
Dupin indicatrix Dupin indicatrix In differential geometry, the Dupin indicatrix is a method for characterising the local shape of a surface. Draw a plane parallel to the tangent plane and a small distance away from it. Consider the intersection of the surface with this plane. The shape of the intersection is related to the Gaussian curvature. The Dupin indicatrix is the result of the limiting process as the plane approaches the tangent plane. The indicatrix was invented by Charles Dupin. For elliptical points where the Gaussian curvature is positive the intersection will either be empty or form a closed curve. In the