Video: The Problem of Time in Quantum Gravity and Cosmology

Fra

I haven't been able to see any more lectures yet due to time :( Instead I decided to analyze Rovelli's thinking slowly. But somehow, it feels that it's more or less conceptually connected questions, seen from different angles. So I might as well anything in the ballpark and the same part of my brain starts spinning in the same mode.

I personally dig the "relational ideas", and I think in this picture symmetries are dynamical things. The use of symmetries in the classical thinking is IMO more like tools for reasoning. By assuming symmetry one can obviously draw far reaching conclusions, but if this assumption is dynamical to start with, the conclusions are misleading. So if the degress of symmetry are dynamical and quantified, it can translate into emergent tools of reasoning which comes out as very plausible and deep scientific framework that is also deeply satisfactory from my philosophical point of view of science.

/Fredrik

marcus

Links to lectures 4A and 4B are posted
http://pirsa.org/08010036/

http://pirsa.org/08010042/

but AFAICS the lectures are not yet available at those links

the screen just says "waiting for presentation to begin"

UPDATE: The talks are available now.

Micha

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