It says that x' = gamma (x-vt) Now what exactly does that formula mean? I take it that x is a point in my coordinate system, let's say 2 meters. I take it that v is the speed of the other reference frame or am I not correct in saying that? What exactly does that V refer to? I take it that the t = time in my coordinate system. So would this make sense? In my coordinate system an event happens at distance of 2 meters and at 2 seconds. The following train is moving at .5c relative to me. Is this following equation right? 2-.5(2) x gamma = the distance in the other coordinate system. It appears according to the Interactive Minkowski Diagram when the t and d are the same number in my coordinate system, they will be different but equal numbers in the other coordinate system.