On superluminal phenomena and frames in special and in general relativity also in connection with Reissner-Nordstroem's and Kerr's solutions

The author's recent work on superluminal phenomena and frames in special and in general relativity is shortly reviewed and commented in connection with comments of other authors. An extension of the already published theory is also suggested. One finds that the space-time peculiar of the extended theory is the union of an infinite number of regions with infinite space-like extensions. This result provides a physical interpretation for the maximal extensions of Reissner-Nordstroem's and Kerr's solutions