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).
Ham Fisher well known in cartooning circles, and it became personal and vitriolic as Capp's strip eclipsed "Joe Palooka" in popularity. In the 1930s, to replace Capp, Fisher hired away Capp's top assistant, Moe Leff, along with Phil Boyle and a letterer. All three continued to work for Fisher for two decades. Fisher, Leff and Boyle all collaborated on the art, with Leff drawing the figures and Fisher doing the heads. Leff also contributed to scripting the strip. After Fisher underwent plastic surgery, Capp once included a racehorse in "L'il Abner" named Ham's Nose Bob. Traveling in the same social circles, the