R Shurtleff - arXiv preprint gr-qc/0502021, 2005 - arxiv.org
In flat spacetime, as a simple 4-vector, a particle's 4-velocity cannot be changed by translation. Parallel translation then produces constant velocity, motion without force. Here …
Jason W. Brown Process and the Authentic Life Toward a Psychology of Value Page 1 Jason W. Brown Process and the Authentic Life Toward a Psychology of Value Page 2 …