Mathematics-powered Propulsion is a method of propulsion which utilizes the power of pure mathematics. The Eltreum uses this form of propulsion. In mathematics-powered propulsion, a craft is propelled forward by mathematically changing its position in space, rather than by using more traditional fuel-based propulsion methods. Although it requires no fuel, this method does require the usage of psychically-enabled humans and/or porpoises as pilots. This could possibly be a predecessor to the Topless.