4 papers · 1 filter
Twin Paradox and Causality
T. Grandou, J. L. Rubin
After pointing out the historical avatar at the origin of a would be twin or clock paradox, we argue that, at least on a local scale, the (re-qualified) paradox is but a necessary…
Time 'betwins'
Thierry Grandou, Jacques L. Rubin
Discussions on the Langevin Twins 'paradox' are most often based on a "triangular" diagram which outlines the twins spacetime travels. It won't be our way, avoiding what we think t…
Navigation of Spacetime Ships in Unified Gravitational and Electromagnetic Waves
Jacques L. Rubin
On the basis of a "local" principle of equivalence of general relativity, we consider a navigation in a kind of "4D-ocean" involving measurements of conformally invariant physical…
Pfaff systems theory and the unifications of gravitation and electromagnetism
Jacques L. Rubin
We show in the framework of Pfaff systems theory, the functional dependences of the general analytic solutions of a suitable system of involutive differential equations describing…