(1) Dipartimento di Matematica, Università di Roma “La Sapienza”, Roma, Italy;(2) ENEA – Centro Ricerche Casaccia, Via Anguillarese, 301 00060, S. Maria di Galeria, Roma, Italy
Abstract:
The use of hyperbolic numbers for studying space-time geometry and trigonometry is extended for demonstrating the Frenet’s
formulas in space-time.
By means of this introduction the twin paradox for non-uniformly accelerated motions is formalized in a straightforward way.