256 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of the Basque CountryES11 papers
- Donostia International Physics CenterES7 papers
- IkerbasqueES7 papers
- IkerlanES5 papers
- GAIKER Technology CentreES4 papers
- Universitat de BarcelonaES4 papers
- Material Physics CenterES3 papers
- Basque Center for Applied MathematicsES2 papers
- Biogipuzkoa Health Research InstituteES2 papers
- CIC nanoGUNEES2 papers
- National Institute of InformaticsJP2 papers
- OsloMet – Oslo Metropolitan UniversityNO2 papers
4 papers · 1 filter
A relativistic generalisation of rigid motions
J Llosa, A Molina, D Soler
Radar-holonomic congruences of wordlines are proposed as a weaker substitute for the too restrictive class of Born-rigid motions. The definition is expressed as a set of differenti…
Reference frames and rigid motions in relativity: Applications
D. Soler
The concept of rigid reference frame and of constricted spatial metric, given in the previous work [\emph{Class. Quantum Grav.} {\bf 21}, 3067,(2004)] are here applied to some spec…
On the degrees of freedom of a semi-Riemannian metric
Josep Llosa, Daniel Soler
A semi-Riemannian metric in a n-manifold has n(n-1)/2 degrees of freedom, i.e. as many as the number of components of a differential 2-form. We prove that any semi-Riemannian metri…
Reference frames and rigid motions in relativity
J. Llosa, D. Soler
A reference frame consists of: a reference space, a time scale and a spatial metric. The geometric structure induced by these objects in spacetime is developed. The existence of a…