Max Tegmark advocates the iniverse being a purely mathematical structure. There are predecessors of this idea in history, e.g. the ancient Greeks or Eugene Wigner and his famous and often quoted article The Unreasonable Effectiveness of Mathematics in the Natural Sciences.
Our Mathematical Universe
Max Tegmark
Sep 16, 2013
WP: Max Tegmark
WP: Eugene Wigner
WP: The Unreasonable Effectiveness of Mathematics in the Natural Sciences