München 2019 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 13: Alternative Approaches to Quantum Gravity

GR 13.1: Talk

Thursday, March 21, 2019, 15:00–15:15, HS 5

The tacit assumption of continuity of spacetime in quantum gravity — •René Friedrich — Strasbourg

Theories of quantum gravity are attempting without success the quantization of spacetime. They are founded on the tacit assumption of a continuous, differentiable manifold of Lorentzian spacetime. It will be shown, based on 5 different approaches, that general relativity unexpectedly does not admit any manifold character for spacetimes with Lorentzian metric.