Roulette (curve) in this case, the point lies on the circle then the roulette is a cycloid. A related concept is a glissette, the curve described by a point attached to a given curve as it slides along two (or more) given curves. Formally speaking, the curves must be differentiable curves in the Euclidean plane. The "fixed curve" is kept invariant; the "rolling curve" is subjected to a continuous congruence transformation such that at all times the curves are tangent at a point of contact that moves with the same speed when taken along either curve (another way to express this constraint
The Wheel of Time The Wheel of Time The Wheel of Time is a series of high fantasy novels written by American author James Oliver Rigney Jr., under his pen name of Robert Jordan. Originally planned as a six-book series, "The Wheel of Time" spanned fourteen volumes, in addition to a prequel novel and two companion books. Jordan began writing the first volume, "The Eye of the World", in 1984, and it was published in January 1990. The author died in 2007 while working on what was planned to be the twelfth and final volume in the series. He prepared extensive notes so another