Hypocycloid prove that an epicycloid with "k" cusps moves snugly inside one with "k"+1 cusps. The evolute of a hypocycloid is an enlarged version of the hypocycloid itself, while the involute of a hypocycloid is a reduced copy of itself. The pedal of a hypocycloid with pole at the center of the hypocycloid is a rose curve. The isoptic of a hypocycloid is a hypocycloid. Curves similar to hypocyloids can be drawn with the Spirograph toy. Specifically, the Spirograph can draw hypotrochoids and epitrochoids. The Pittsburgh Steelers' logo, which is based on the Steelmark, includes three astroids (hypocycloids of four cusps).
The Toy Collector The Toy Collector The Toy Collector is a novel written by James Gunn, published by Bloomsbury Publishing in 2000. It is the story of a hospital orderly who steals drugs from the hospital which he sells to help keep his toy collection habit alive. Although the work is fictional, the name of the protagonist is James Gunn. The novel flashes back and forth between the character Gunn's drug-addled, sexually abusive adult life, and his life among his childhood friends. Furthermore, we see the lives of Gunn's childhood toys—from Rom, Spaceknight to the Fisher-Price Little People, who seem to have lives