According to Temak's classification, there are three separate layers.

2nd layer: post-inflation foam.

As a variation of the expansion theory of the universe, the Chaos Inflation Theory, parallel universes expand in a holistic way, and this expansion will continue forever. But a certain area of the universe has stopped expanding and has taken on a variety of bubble forms. This bubble is the parallel universe of the underdeveloped first layer. Andrea Glade and Vitaly Vanchurin calculated that the number of the universe was 10,000,000 units of measurement. It is possible that different bubbles have undergone the rupture of the primary symmetry, and as a result, they have different properties of different physical quantities. This level includes John Archibald Wheeler's Oscillatory Universe Theory and Lee Smolin's Fecund Universes Theory.

Level 3: Many-Worlds Interpretation in Quantum Mechanics.

Hugh Everett's Many-Worlds Interpretation (MWI) is one of many mainstream explanations of quantum mechanics. As an aspect of quantum mechanics, it is not absolutely predictable by a single observation. Instead, it may trigger different probabilities on a larger scale. According to MWI theory, these different observations correspond to different universes. Like shaking a six-sided dice, the results are consistent with observable measurements of quantum mechanics. Six universes corresponding to the 6 sides of the dice are revealed. (More correctly, in the MWI theory, despite the singularity of the existence of the universe, they usually cannot interact with each other after the fragmentation of the plurality of worlds.) ）

Temak believes that the content of parallel universes in the third layer in the Hubble volume is not greater than the probability of parallel universes in the first ~ second layers. In fact, in the parallel universe of the third layer with the same physical definite, all the different worlds formed by the split can be found in multiple Hubble volumes in the parallel universe of level 1. Temak elaborated as follows: The only difference between the first and third layers is the difference in where the complex of people live.

In the first layer, they reside anywhere in the three-dimensional dimension. In the third level, they inhabit infinite dimensional worlds that are different from other quantums in Hilbert Space. In the same way, the bubble universe of level two, which has all the different physical fixed numbers, can in fact be seen as a "world" created at the moment of the rupture of primary symmetry in the parallel universe of the third level.

Ideas related to multiple worlds include Richard Phillips Feynman's interpretation of multiple histories and H. Feynman's interpretation of multiple histories. Dieter Zeh's Many-minds interpretation.

Tier 4: The Ultimate Collection.

The ultimate collection hypothesis is advocated by Temak himself. The universe, which can be described in different mathematical structures, is considered to all actually exist in a reciprocal way. The different low-energy physical laws of the unobservable universe are not included in it. Temak advocates the following views. Abstract mathematics is so universal that the Universal Theory of Everything (TOE), which can be defined in any pure language, cannot be separated from the mathematical structure.

For example, TOP, which contains different kinds of entities (expressed in language) and their relations (expressed in language), is not only called a set theory model by mathematicians, but also a formal system of composition. This implies that all conceivable theories of parallel universes can be described at Level 4. Because the parallel universe of level 4 contains all the other sets, it becomes the upper limit of the parallel universe level. This leads to the loss of room to consider parallel universes at Level 5.

Jürgen Schmidhuber argues that the "set of mathematical constructs" is not clearly defined. He only endorsed constructive mathematics, that is, representations of the universe that could be described through computer programs.

Among them, the output bit can be controlled for a limited time, and the control time itself cannot be predicted due to the influence of the program due to the limit of Coulter, but the description of the universe that can be described is very clearly included due to the non-stop program. In addition, he explicitly disagrees with the relatively limited set of universes that can perform extremely fast calculations.

The main argument for parallel universes is that they are wasteful and bizarre, so consider these two points in turn. First, parallel universe theories are easily attacked by Occam's razor principle, because they assume that other universes exist that people can never observe. Why is nature so ontologically wasteful and indulged in these endless worlds, but this can also in turn support parallel universes. When people feel that nature is too wasteful, what exactly is it that people are confused about is clearly not "space", because the infinite volume in the standard flat universe model does not cause such an objection. It's not "matter" or "atom" – it's the same reason, who cares to waste more once you've wasted infinite things.

So, this confusing "waste" is more of a simplification that reduces the amount of information needed to illustrate all these invisible worlds. However, as Temark has discussed at length, the whole set tends to be much simpler than the individual elements in the set. For example, the information content of an algorithm for an ordinary integer n is in the order of magnitude, which is the number of bits required to write it in binary. However, the set of all integers, 1, 2, 3,... , which only requires a few lines of computer programming to generate, so the algorithm complexity of the entire set is much smaller than that of one of the integers.

Similarly, the set of all ideal fluid solutions of Einstein's gravitational field equations is much less complex than one of the special solutions, because the former requires only a few equations to describe, while the latter requires a large amount of initial data to be specified on a hypersurface. Strictly speaking, when people limit their attention to a particular element in a set, the content of apparent information increases, but the inherent symmetry and simplicity of the whole system when all elements are taken into account. In this sense, higher-level parallel universes have lower algorithmic complexity.

From the ordinary universe to the first parallel universe, there is no need to specify the initial conditions, to the second layer, there is no need to specify physical constants, and to the fourth parallel universe containing all mathematical structures, there is no inherently no algorithmic complexity. It is only from the frog's point of view, from the subjective feeling of the observer, that there is a surplus and complexity of information. It can be shown that the theory of parallel universes is much more economical than the theory of a single universe that takes only one set of elements as its physical existence.

The second common complaint is that parallel universes are too bizarre. But this objection is mostly aesthetic, rather than scientific, and yet, as mentioned above, this view only makes sense in Aristotle's worldview. In Plato's model, if the bird's perspective is different enough from the frog's, it is likely that the observer will complain that the correct TOE is so bizarre, and every indication indicates that this is exactly what people are in.

There is nothing to fuss about the bizarre that people feel, because evolution has only given people an intuition about everyday physics that has enabled their ancient ancestors to survive. But thanks to wisdom and creativity, people have seen a little more than the frog's perspective from the general insider's point of view, and it is certain that people have encountered bizarre phenomena anywhere beyond the original human understanding: high speed (clock-slow effect), small scale (quantum particles can exist in several places at the same time), large scale (black holes), low temperature (liquid helium that can flow upward), high temperature (collision particles can change identity), and so on.

So, physicists have generally accepted that the bird's perspective is very different from the frog's. A modern popular view of quantum field theory is that the Standard Model is also just a valid theory, the low-energy limit of another theory that has not yet been discovered, and which is far removed from a comfortable classical concept (e.g., a string containing ten dimensions).

Many experimentalists have become numb to so many "bizarre" (but reproducible) results, simply accept the idea that the world is more bizarre than one might think, and then bury their heads in the calculations.

After a long period of study, Hua Feng felt that while the days became regular, the more prominent normalcy was boredom, which was slowly killing his fading passion. Although he also understands that there are times when things become less likely to be controlled over time, he is not the kind of person who is willing to give up easily.

Especially after learning about the current situation, after learning so many things that I have never been exposed to before. Hua Feng feels that many things may not be as complicated as imagined, the key to the problem is whether you are willing to work hard, even if there is little hope, even if the probability of success is only a pitiful few percent. But as long as you give up, you will inevitably usher in 100% failure.

At this time, in another place, a group of people were busy with intense calculations in the hall of the non-slow instrument.

"How long is it until the time and space collapse?" asked the assistant as a middle-aged man stared at the screen without looking back.

"Report chief, according to incomplete statistics, if you don't count the actions to maintain the space, we only have about two years to prepare. The assistant replied cautiously, with a tone of not very sure.

The middle-aged chief nodded, lost in thought.