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## Main Question or Discussion Point

**Four principles for quantum gravity**

Lee Smolin

(Submitted on 6 Oct 2016)

Four principles are proposed to underlie the quantum theory of gravity. We show that these suffice to recover the Einstein equations. We also suggest that MOND results from a modification of the classical equivalence principle, due to quantum gravity effects.

Comments: 26 pages, one figure and caption taken from McGaugh, Lelli, Schombert, arXiv:1609.05917v1

Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)

Cite as: arXiv:1610.01968 [gr-qc]

(or arXiv:1610.01968v1 [gr-qc] for this version)

MOND can explain most of the effects attributed to dark matter, and Smolin is proposing that a general feature of a QG is MOND like effects due to QG. in effect Smolin is providing a quantum basis for an empirical curve-fit.