Tegmark IV and many worlds have little to nothing to do with each other.
The Everett branches of the “many worlds” all follow the same physical laws—the same equations.
Tegmark IV demands that every possible alternate set of equations is equally “real” as our own, that a concept existing in abstract mathematical form and a physical structure existing in reality is one and the same thing. Effectively it attempts to explain reality by arguing the word reality has no meaning.
I would need to know more about physics to even understand how this differs from many-worlds.
Tegmark IV and many worlds have little to nothing to do with each other.
The Everett branches of the “many worlds” all follow the same physical laws—the same equations.
Tegmark IV demands that every possible alternate set of equations is equally “real” as our own, that a concept existing in abstract mathematical form and a physical structure existing in reality is one and the same thing. Effectively it attempts to explain reality by arguing the word reality has no meaning.