Roulette (curve) application of this is that a square wheel could roll without bouncing on a road that is a matched series of catenary arcs. Roulette (curve) In the differential geometry of curves, a roulette is a kind of curve, generalizing cycloids, epicycloids, hypocycloids, trochoids, and involutes. Roughly speaking, a roulette is the curve described by a point (called the "generator" or "pole") attached to a given curve as that curve rolls without slipping, along a second given curve that is fixed. More precisely, given a curve attached to a plane which is moving so that the curve rolls, without slipping, along
Butterfly on a Wheel Butterfly on a Wheel Butterfly on a Wheel (US: Shattered, Europe: Desperate Hours) is a 2007 British–Canadian mystery thriller film directed by Mike Barker, co-produced and written by William Morrissey, and starring Pierce Brosnan, Gerard Butler, and Maria Bello. The film's title is an allusion to a line of Alexander Pope's poem "Epistle to Dr Arbuthnot": "Who breaks a butterfly upon a wheel?" The line is usually interpreted as questioning why someone would put great effort into achieving something minor or unimportant, or who would punish a minor offender with a disproportional punishment. Chicago residents Neil Randall (Gerard Butler) and