Every physicist and most non-physicists have heard that no object or signal can move faster than the speed of light in a vacuum c. However, when we study the literature on Einstein's special relativity theory carefully, we will find a less well-known 2c speed limit (double light speed limit)...

Closed form formulae for European barrier options are well known from the literature. This is not the case for American barrier options, for which no closed form formulae have been published. One has therefore had to resort to numerical methods. Using lattice models like a binomial or a...