...> is the possibility to describe spacetime by quaternions. Those have the intrinsic property of spin. ". Imagine 5 GPS-like birds shining well-regulated atom lasers at you. With 4, you know X, Y, Z and T but ( I imagine ) the fifth would tell you the strength of your gravitational field, thus improving ...

... this, is the possibility to describe spacetime by quaternions. Those have the intrinsic property of spin. ”. Imagine 5 GPS-like birds shining well-regulated atom lasers at you. With 4, you know X, Y, Z and T but ( I imagine ) the fifth would tell you the strength of your gravitational field, thus improving the ...

Rick wrote: Energy density is scalar, Not in modern physics. In all current theories of physics, energy density is the time-time component of the energy-momentum tensor, and thus is not a scalar. [... rest ignored]] It is always a good idea to get your starting point correct, before spinning a grand castle in the air without any foundation. Tom Roberts