Max Tegmark: The Mathematical Universe

Those of us who know Max Tegmark as a mainstream perfectionist researcher who deals with real cold cosmological data will be amused by his work

• The Mathematical Universe

in which he tries to decide the validity of the External Reality Hypothesis, the Mathematical Universe Hypothesis, the Computable Universe Hypothesis, and whether or not we live in the Matrix. ;-)

Hep-th




On hep-th, Kallosh and Linde are testing string theory with the CMB. Green, Ooguri, and Schwarz argue that one can't decouple supergravity from string theory in dimensions higher than three and N=8 supergravity probably belongs to the swampland - very much the same arguments we explained at the end of Finiteness of SUGRA.