The weather in July is very hot, Xu Mang is very afraid of the heat, at this time he is wearing a sun hat, wearing polarizers for driving, and by the way, he is also wearing a mask, basically armed for barbecue, of course, the mask is Xiao Man's heartache for her husband, temporarily added.

But...

It's hotter and more breathable... I just took the heat and stuffed it inside.

At this moment,

Xu Mang and Chen Xi had just set up a barbecue grill, poured a little gasoline on the charcoal, and it quickly burned, but... The whole process was the two of them working, and the other two boys were like uncles, sitting on the side, not moving.

"Tatsuki?"

"What's the situation with your friend?" Xu Mang had a big opinion on this, and said helplessly: "What's the matter?"

“...”

"They are all rich second generations, and they are very good at reading, and they are studying in the Ivy League, so they naturally feel that they are one level higher than others. Tatsuki glanced at the two boys: "These two seem to be from the University of Pennsylvania, and they seem to be majoring in astrophysics." ”

Xu Mang: ???

it!

So awesome?

However, according to Xu's knowledge, Princeton University, the second is the California Institute of Technology, the third is the University of Chicago, and the University of Pennsylvania is ranked twelfth in this major.

It's not good,

"That..."

"What about the two girls?" Xu Mang asked curiously, "What school do you attend?"

"Uh..."

"One Harvard, the other Yale. Chen Xi said: "Mathematics major and physical optics major, in short, these people are all science, and you are almost the same." ”

At this point,

Xu Mang suddenly thought of the problem he had encountered, and the wire metamaterial was estimated to be impossible... These four people can't do it alone, but they can help calculate various data on exocelestial objects, which is exactly what solves the problem of oxygen fugitivity.

Not bad... This barbecue was a bit of a bonus!

But it seems that the four of them are quite arrogant, and they need to be convinced.

"Tatsuki?"

"If I say that I am Xu Mang, and now I want you to participate in a research project, do you think your four friends will join this research project with admiration?" Xu Mang asked cautiously.

"I don't know... Give it a try. Tatsuki said.

Try?

What if someone else doesn't want to?

Isn't it very embarrassing?

Xu Mang won't joke with his own face, these days... Face is more important than life, blindly disclosing your name, in case of rejection by others, this is not just a loss of face, according to your own character, it is estimated that you will commit suicide by swallowing feces in the next second.

Never mind

Let's take a step at a time, but these four tool people are really easy to use.

soon

The barbecue conference was officially launched, according to the labor distribution that was said before, the four boys surrounded the barbecue stove and started the so-called barbecued food, Xu Mang was basically roasting vegetables, Yang Xiaoman didn't like to eat meat very much, especially this kind of meat after smoking.

According to Xiaoman, eating more barbecue will cause fire, and as soon as it is on fire, you will have acne on your face, and as soon as you get acne, it will become ugly, and then you need to use a variety of acne products, and you must be very careful not to leave acne marks, in short, acne is very painful for Xiaoman.

I have to say,

Xiao Man is just an ordinary girl, although she has an angelic face, she is praised by many melon-eating people as an angel who has fallen into the mortal world, although the kind that hits the ground first, but after all, Xiao Man will have the same troubles as all women.

But this girl is very real, at least Xu Mang likes such a girl very much, if everything is unpicky, then what is the point?

"Two brothers?"

"Your surname?" asked Xu Mang with a smile.

"Don't have your surname Tong, a single name and a Min. The boy with glasses said with a blank face.

"My surname is Lu, and my single name is Bo. The boy, who looked the same way, said indifferently.

Xu Mang: (°ー°〃)

How do you feel that something is wrong...

Alas?

This is pretending to be forced, right?

In the face of the cold reply, Xu Mang did not continue to deal with the two, silently making a barbecue for Xiao Man who was enjoying the shade of the tree, at this moment... The noble Professor Xu has been reduced to the exclusive tool man of the violent airfield.

呲呲呲,

After brushing a layer of oil and turning over the corn, Xu Mang sat on a chair and waited for the corn to change qualitatively due to the high temperature.

"Tong Min?"

"One of the topics taught to us is that according to the scale gauge of the expanding universe - ds^2=dt^2-R^2 (dx^2+dy^2+dz^2), in which the possible curvature of space is ignored, and the specific form of the function R(t) depends on the material content of the universe. ”

"So how to solve the next four problems?" Lu Bo asked curiously while grilling the skewers, "These four questions... I feel like it's a bit too much, just the first problem is to calculate the ratio of energy and momentum to time of a particle with mass m at moment t0. ”

"Alas!"

"That's the first question... It's already ridiculously difficult to stage, the following three... proving the state of thermal equilibrium consisting of interacting, massless particles, while the universe consisting of mass particles does not maintain thermal equilibrium, determining issues such as the velocity and energy of neutrinos..."

"Isn't this fatal?" Lu Bo said with a painful face: "I feel that the professor is playing with us, what kind of knowledge is astrophysics, this is basically the content of theoretical physics, I asked... This is what relativistic cosmology is about. ”

Tong Min smiled bitterly and said silently: "What can I do then? This is an assigned topic, and it must be explained... It is also necessary to make calculations and text explanations, and record them in the credits, and when you encounter such a neurotic professor, you can only admit that you are unlucky. ”

Suddenly,

The anger became a little dignified.

"Huh?"

"Or... Let Liu Yan and Zhao Pengpeng help us solve these problems together?" Lu Bo said: "It involves a lot of mathematics, and it just so happens that Liu Yan is a graduate student in the Department of Mathematics at Harvard. At least the math isn't a problem. ”

"But..."

"We're having a barbecue. Tong Min was convinced, but in the current situation, it is a bit rude to others not to barbecue but to solve the problem of relativistic cosmology.

"Tatsuki..."

"Please bake the rest of the stuff for us with your buddies. Lu Bo said helplessly: "Now Tong Min and I are ants on a hot pot, and it is rare to meet Liu Yan and Zhao Pengpeng, and I want them to help us solve the problem... I'm sorry. ”

Tatsuki is so angry, special... Labor and management came to you for a barbecue, you actually ran over to solve some cosmic problem, what does the universe have to do with the two of you, even if the universe is about to be destroyed, isn't there still the Avengers, they will save the universe!

"Go, go, go!"

Xu Mang smiled and said, "What do you want to eat?" ”

Seeing Xu Mang, who had a charitable face, Tong Min and Lu Bo's favorability towards him skyrocketed.

"Whatever. ”

"Tong Min and I can eat anything, thank you... Dude!"

Words fall,

The two left the barbecue grill.

Looking at the backs of the two, Chen Xi asked with a puzzled face: "Brother Mang... This... And that's going to let them go?"

"It doesn't matter. ”

"These four... I can't solve it. Xu Mang said with a smile: "Anyway... What major are you studying at Modu Normal University?"

"Uh..."

"It's a gangster day, my dad originally arranged for me to go to the United States, I didn't want to go... Stick to staying here. Tatsuki said, "It's not a big deal... The main thing is that I can't stand Tianmei, her grades are stable on the Qing University and Peking University, and the result... I came to Jida to study. ”

"It's all a prestigious school. ”

"Actually, it doesn't make a difference. Xu Mang smiled: "If you feel a little guilty, add more Guo Tianmei in the future, right... In this matter, your Xiaoman sister was particularly dissatisfied with your approach, and a 20,000 yuan bag sent Tianmei away, and your Xiaoman sister almost exploded at that time. ”

Tatsuki shrank his head and said cautiously, "Will I be beaten?"

"Not really. ”

"You can't run away from a single meal. Xu Mang said seriously: "Don't be resentful, your sister Xiaoman is such a person, the more concerned people are, the more irritable she will be, you look at me... Being beaten by her at every turn, this is what your little sister Man looks like about caring about people. ”

it!

Great work... Brother Blank!

"Brother Wandering?"

"Anyway, you're now... What level is it?" Chen Xi asked curiously: "I often see you on the news, and No. 1 Middle School now puts the awards you get in the most conspicuous position, I think... The principal can't wait to put your profile picture on the school building. ”

"Hehe..."

"Internationally renowned scientists. Xu Mang said indifferently: "There are too many titles... I can't count them. ”

Hearing Xu Mang's words, Chen Xi couldn't help but sigh... On pretending to be forced, Brother Xu Mang's stubborn... Basically invincible.

meanwhile

Yang Xiaoman and Guo Tianmei hid in the shade of a tree to chat, and suddenly saw two barbecue tool people, holding chairs and sitting next to the other two returnee girls, the four of them began to discuss what the problem was, and even took out a tablet from the satchel and began to analyze the problem.

What's the situation?

Don't grill well and suddenly start to solve the problem?

Don't...

Are all those who have studied abroad so boring?

Do you need to make accurate calculations for barbecue?

"What's the situation?"

"What's going on with these four guys?" Yang Xiaoman frowned, and asked Tianmei beside him, "What the hell are you doing together?"

"I don't know. ”

"But one thing is certain, these four are not interested in barbecue. Guo Tianmei said: "In short, these four people are very high-end, especially the two boys, do they understand the concept of pulling out a black hole, and then the four of them fought for a long time in the car about this concept, as if... I don't know what the problem is, it seems to be a calculation problem. ”

"Cut!"

"It's not that I deliberately belittle these four people, you Brother Xu Mang are an authoritative expert in this area. Yang Xiaoman showed a disdainful expression on his face, and said with disdain: "Forget it... Ignore these four people, it's not all the way anyway. ”

On the other side,

Tong Min, Lu Bo, Liu Yanhe and Zhao Pengpeng are in a predicament, and the four of them are not interested in barbecue, so they take this opportunity to solve the problem of the concept of an expanding universe in relativistic cosmology, but... The four were hampered.

One question is already a tragedy ... If the energy and momentum are E0 and P0 respectively, assuming that R(t0) = R0, after which the particles will propagate freely except under the influence of the above gauge, how can the energy and momentum and time ratio be calculated?

How can the thinking kinetic energy of a particle be described as kinetic energy?

How do you calculate the particle energy from the R^2(dr/dR)= constant?

The four of them were in an awkward dilemma in calculating the functionalities of energy, momentum, and time in the expanding universe.

Half an hour,

For half an hour, I didn't have a clue.

Then

A voice came from behind him.

"Your lamb skewers are ready!"

Xu Mang held a handful of mutton skewers, stood on the side with a smile on his face, suddenly stretched out his head to look at the calculation process in the hands of the four people, and asked curiously, "What are you doing?"

......