Bonn 2001 – scientific programme

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GR: Gravitation und Relativitätstheorie

GR 11: Grundlegende Probleme und allgemeiner Formalismus

GR 11.3: Fachvortrag

Wednesday, March 28, 2001, 17:00–17:15, VII

Uniqueness of Simultaneity in Special Relativity — •Domenico Giulini — Institut für Theoretische Physik der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Schweiz

It is often asked to what extent Einstein’s definition of simultaneity (in special relativity) relative to an inertial frame is unique (or conventional). We approach this question by first definining “simultaneity” to be an Aut-invariant equivalence relation on R⁴, where Aut is the automorphism group of spacetime, and, second, classify all such relations.