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The document discusses the potential of using gravitational lensing of distant quasars to measure variations in the gravitational constant G over cosmological time. It outlines four observables related to gravitational lensing that can help isolate G from other cosmological parameters. The authors estimate that constraints on G derived from this method may compete with or exceed current direct limits, although extracting this information is intertwined with fixing other cosmological parameters.

Author

Vishal Yadav

Language

EN