Next, Juchen said to everyone: "Not being prepared doesn't mean that I won't say anything, I ask everyone to ask high-quality questions, and ask whatever you want to hear." Please pick up your phone and scan this QR code with a guestbook where you can ask questions. I'll see it right away. ”

A huge QR code appeared on the big screen, which was prepared by the organizers.

The first high-quality question appeared a minute later: "Mr. Ju, your three-dimensional theory of the universe is very wonderful, but it has risen to the philosophical level, but I don't think this can erase the philosophy of the universal connection and opposition of all things, for example, why is sexual reproduction two genders, not three or four? This means that two is also a very important number in the universe, what do you think?"

Anyone can break a few sentences in philosophical speculation, but the three-dimensional mathematical roots of the universe are not discovered by anyone, which requires profound mathematical skills.

Juchen thought for a while and replied: "Two is a special case of three, similar to two dimensions in a three-dimensional subset, the essence of life lies in replication, the so-called replication, there is a template and the offspring copied according to the template, sexual reproduction is also replication, the difference is only that the template of replication provides a part of the data of each template, which can greatly improve the speed of evolution."

Because the mutation of genes is very slow, asexual reproduction has to evolve such a complex organ as the eye, I don't know what monkey years and months to go, and every iteration of sexual reproduction will blend the genes of the two parents together, into a very different offspring, taking humans as an example, we have 23 pairs of chromosomes, the number of combinations of children is 2 to the 23rd power, more than 8 million species, although our children look similar to their parents, but the genes have completely changed.

In addition, sexual selection is also a parameter of a strategy that exacerbates the concentration of similar traits. Sexual reproduction gathers a large number of similar traits, which is the mystery of accelerating the differentiation of populations and accelerating evolution. It may have taken 1 trillion years for asexual reproduction to evolve as advanced animals as mammals, but sexual reproduction has brought us here now, only 4 billion years after the birth of the first life.

As you may have noticed, why do children with nearly 50% of their genes change 'pretend' to be like their parents?

Why is this student's question a good question? Because it is very enlightening, if I take graduate students in the future, I will ask them to study, using mathematical methods, to study what happens when there are three genders, which may produce chaotic courtship strategies and parenting strategies, so that parents and the third elder are confused, and the offspring may also feel at a loss, and these strategies are unstable, maybe they consume special nutrients and energy, and they are not good, so it is rare for more than two genders to appear in nature, which is > with Fermat's great theorem2 is implicitly consistent with no positive integer solution. ”

In this way, even sexual reproduction can be explained by n>2 causing chaos? Some of the spiritual students in the audience were very excited and said, "This theory is too bullish! This professor is really a god, little Ein!"

"What little Ein? It should be little Darwin!"

"Isn't it a combination of Einstein and Darwin? So, call it Ein-Darwin, haha!"

There is a special "classmate" in the audience, He Qing, a mysterious organization who got in through a special channel, she doesn't know much about physics, mathematics and biology, but she is very excited to see some classmates around her, thinking that this master can be invited to give a speech at the famous Haizhu University during his sentence, it must be an extraordinary achievement, and the things in her head are extraordinary.

The second question: "How do you explain the fact that the total energy and matter of the universe are constant, which is in conflict with the infinite universe?"

Juchen thinks this is also a good question, because he can talk about his latest thinking on the infinite universe: "If we assume that the energy and matter in the universe are really constant, then we will come to the conclusion that this universe will be constantly repeating itself, and although this cycle may be shockingly unknown how many billions of billions of years, it is still completely repeated.

Because energy and matter are limited, after exhausting all possibilities, there will come a day when all energy and matter in the universe are exactly the same as before, and then the previous cosmic cycle will be completely repeated. Some say that, according to Heisenberg's uncertainty principle, isn't it possible for every quantum state to be different?

Students who think this way may not have experienced the time of the cosmic cycle I said, because it is too frighteningly long, let's put it this way, a quantum dot, there are only two possible states in the same position, two quantum dots, there is a combination of 2 to the 2nd power at the adjacent space point, and the whole universe can also be deduced in this way, I know, the number of this combination of quantum states has been so large that it makes people collapse, but it is still limited.

Can we imagine a universe that repeats itself over and over again? This is a ridiculous conclusion. If this is really possible, then it is not in line with our current observable universe, because our universe is not completely static, everyone knows that our universe is expanding, and the size of the cosmic space is different from moment to moment, and every time the universe changes a little bit, the length of the cosmic cycle just assumed will be incredibly extended.

Students may have heard that there will be quantum fluctuations in a vacuum, and each quantum fluctuation will interfere with the total amount of energy and matter in the universe, as long as the universe is expanding, it is equivalent to energy and matter are not constant. Finally, the infinitely large is equivalent to the infinitesimal small, and we cannot be in the infinitely large universe at the lowest corner of the order of magnitude. Thank you!"

The third question: "Professor Ju, according to Einstein's theory of relativity, time is also a dimension, so the universe is three-dimensional + time, what do you think of this statement?"

Ju Chen: "I completely disagree with the idea of time as a dimension of space, which would cause a lot of confusion, because time and space are completely different.

In mathematics, natural numbers are countable, real numbers are uncountable, but natural numbers are only a subset of real numbers, and secular people's concept of time is the level of natural numbers, thinking that time can be 1, 2, 3, 4 Count all the way in this way, but you don't know that the comparison of sizes is the lower level, real numbers can compare sizes, natural numbers as a subset of real numbers, of course, you can, the real universe is closer to real numbers, so the passage of time here is to emphasize the order of events, not the order of all events in turn.

If you have to rank the events of the universe one by one like natural numbers, it is impossible, the time described in the theory of relativity is more like a restoration of the essence of time, it is uncountable, you can compare the order of occurrence of specific events, but there is no absolute standard, it is precisely because of the uncountable nature of time that time travel is impossible, every millisecond, The change in the state of the universe produced by each femtosecond is a change in the real number, and it seems to be from 1 to 2, but this is only an approximate numerical solution, and it is an endless trouble to reverse.

At the moment, all science fiction claims to have time travel are nonsense, and they may not even know the fundamental difference between real and natural numbers, let alone where the bendable nature of relativistic time comes from.

There is also a fundamental difference between space and time, space can produce quantum fluctuations, that is, vacuum also has weak energy, while time is another physical quantity entirely, a physical quantity used to compare the sequence of two events, which is completely incomparable. So, students, don't associate the three-dimensional dimension of space with time. ”

These three questions are the main interactions of this "speech", Ju Chen is familiar with the application of mathematics knowledge to the real world, which has touched many students and professors.

All in all, Haizhu University is already thinking about how much it will cost to invite this prisoner who is serving a prison sentence to teach, it must be the treatment of a full professor, regardless of whether it is politically correct or not, which is a very rare phenomenon in China, because their friends overseas have already sent news that many world-famous universities have this intention, and the so-called contraband crime is really not a great crime abroad, not to mention that Juchen is likely to be framed.