In a 1614 mathematical attack on multiverse by Locher
From Christopher M. Graney at the Catholic Astronomer:
The most surprising things can be found in astronomy’s history—like “the multiverse,” that collection of parallel universes that is the central theme in Brian Greene’s 2011 book The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos. You might not expect to encounter a multiverse in an astronomy book from four hundred years ago, but in fact you will if you look through a 1614 book entitled Disquisitiones Mathematicae de Controversiis et Novitatibus Astronomicis (or Mathematical Disquisitions Concerning Astronomical Controversies and Novelties) written by Johann Georg Locher of Germany.
Locher’s discussion has multiple parts, and is not that brief, but it goes something like this: Imagine a line of alternating black and white segments of a given actual length, such as six inches, and that this line starts at A and extends infinitely to the right, in the direction of F. Then suppose the black segments are eliminated, and the whites collapsed to the left toward A. Is there now an infinite amount of space remaining to the right of the whites? That can’t be. You cannot start from A and reach the end of the infinite series of white segments. What if the whites were collapsed to the right? Would there be an infinite space in front of A in which to place the infinitude of black segments? Again, no. More.
There are many differences between that guy’s approach to things and ours, but apparently he didn’t think that reality or consciousness or mathematics were a user illusion. That keeps him relevant, perhaps.
See also: In search of a road to reality Turns out it’s a history walk.
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