The Sharpie of the Culebra Cut huge profits from entrance fees. This is one of Rosa's most historically accurate stories. The Sharpie of the Culebra Cut "The Sharpie of the Culebra Cut" is a 2001 Donald Duck comic story by Don Rosa. Rosa intended it as an "in-between" story to accompany his anthology "The Life and Times of Scrooge McDuck", happening chronologically between chapter 10: "The Invader of Fort Duckburg" and chapter 11: "The Empire-Builder from Calisota". The story is set in 1906. Scrooge McDuck, along with his sisters Hortense McDuck and Matilda McDuck are mining for gold in Panama, which has just recently separated from
Random walk fact that the boundary of the trajectory of a Wiener process is a fractal of dimension 4/3, a fact predicted by Mandelbrot using simulations but proved only in 2000 by Lawler, Schramm and Werner. A Wiener process enjoys many symmetries random walk does not. For example, a Wiener process walk is invariant to rotations, but the random walk is not, since the underlying grid is not (random walk is invariant to rotations by 90 degrees, but Wiener processes are invariant to rotations by, for example, 17 degrees too). This means that in many cases, problems on a random walk are