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physics.pop-ph2009
The Multiverse Hierarchy
Max Tegmark
I survey physics theories involving parallel universes, arguing that they form a natural four-level hierarchy of multiverses allowing progressively greater diversity. Level I: A ge…
physics.pop-ph2005
On Math, Matter and Mind
Piet Hut, Mark Alford, Max Tegmark
We discuss the nature of reality in the ontological context of Penrose's math-matter-mind triangle. The triangle suggests the circularity of the widespread view that math arises fr…