Group contraction and the nine Cayley-Klein geometries M. A. Fernández Sanjuan OriginalPaper Pages: 1 - 14
Critical comments on the discussion about tachyonic causal paradoxes and on the concept of superluminal reference frame Jerzy Klemens Kowalczyński OriginalPaper Pages: 27 - 60
Group fields, gravity, and angular momentum J. G. WilliamsDavid Finkelstein OriginalPaper Pages: 61 - 66