Tokyo's colorful buildings are like a magical forest.

I looked at the city from a shallow space on the edge of the cement of a certain building. With a slightly crazy look, he said in a sickly tone: "Confused people. What does it take to awaken? ”

Then she turned her head and asked the frightened paralyzed person behind her in an inquiring tone for passers-by, "Hey, you said that adding a little blood would make people sober up a little." ”

Behind the shallow space was a middle-aged man in his fifties who was lying stiff on the ground. More than sixty tiny needles were inserted into his body, and these needles compressed the blood vessels and nerves (all the needles pierced were acupuncture points), and the slightest movement would be very numb and painful.

There was a needle gun piercing the ear hole in the shallow space, and just now she opened the miniature space door accurately, and a section of the space door was near the person's acupoint, and one end was on the muzzle of the needle gun. In this way, stitch by stitch subdued this man.

However, the man in the suit was sweating all over his face at this time, and he could only say, "Don't, don't kill me." Shallow Sky frowned: "Last words, is it so boring?" ”

Shallow Sky walked over with an expression of "I can't stand you", and in the skyscraper of the tall building, a one-meter space door opened, and the other end of this space door opened behind the man's back. The man stiffly looked back at the space door behind him, the wind from the space door was cool, and he could see the small traffic flow like a beetle on the road more than a hundred meters below.

Suddenly, I felt a pain all over my body, and the needles were pulled out. He jerked back and found his white boot-clad feet raised, the force of his feet hitting his chin.

And then, under the impetus of such a force, he fell into the space door. At the other end of the space door is the high altitude between the two towers.

A huge scream echoed through the tall buildings. Ten seconds later, the man fell to you on the ground. Bright red blood splattered on the pavement.

As for the wounds on his body that were originally the size of the needle tip, the coroner could not find them, and under such a huge impact, these needle point wounds would be covered by the cracks created by the impact force. According to the forensic examination, the victim was not subjected to external coercion, there was no drug residue in his body, and there were no traces of rope binding on his body.

Shallow Sky put away the space door, then picked up the phone and said, "Your dead ghost old man has been sent away by me very gently, are you happy now?" ”

On the other side of the phone, he lowered his voice but couldn't hide his excitement and fear, "Really dead?" ”

Asakura smiled: "Do you still have feelings for your father-in-law?" ”

The man on the other side of the phone hurriedly denied it, and then said in a tone of defense: "I have done so much, I have helped him to grow the business step by step, and in the end, just because of my small mistake, he will transfer the business to his unsuccessful son, which is his own fault." ”

Asakura said: "You are such a poor dog, I will see the equity transfer tomorrow, otherwise, I don't mind letting you go to see your stepfather." ”

Shallow hung up the phone, then opened another space door, and then flashed to the roof of another tall building fifty meters away, and Shallow Space controlled the space jump more precisely.

This refinement is due to the effect of her Eye of Time and Space that has become even stronger. The ability of the dual effects of time and space is surprisingly powerful, but shallow space is both joyful and terrified.

Rejoicing because her eyes could see the future for a longer period of time, and trepidation was that she was trembling, knowing what the power of time connected to her. And only shallow space in this world understands how rapid the existence called Tiantian has experienced in this short year.

And the shallow space now sensed the explosion of the days again, and walked out of the space-time gate for the fourth time, she opened the eye of time again, her eyes were confused, and she stuffed her fingers into her mouth, and the saliva at the corner of her mouth flowed down the back of her snow-white hand, with a collapsed expression.

Lu An let her go back, partly with the intention of letting some people in the snake tribe suffer the consequences. Shallow Sky has done just that, and she has become the leader of a great dark force, using her own means to create a sector that already has a huge economic power. This teenage girl with a very delicate face has firmly established herself in the darkness and has become a demon king-level existence. But no one knew that when no one saw her, this indifferent would become such a chaotic performance.

Strength and strength are sometimes two different things, being able to kill and slaughter coldly, but showing attachment in the face of the stronger. The reckless shallow space is now unrestrained, so in many people's perspectives, they can only see the side of shallow space.

At this time, Asaka is frantically chasing power and power that was previously untouchable, but in fact, various mental contradictions have already grown in her, including Stockholm syndrome.

And Lu An, who looks cowardly on the outside, chooses to back down most of the time, chooses self-reflection, and has not given in to some fundamental things in his heart from beginning to end, and still looks at the world cautiously with "self" as the center. When the core is touched, there is no evasion or retreat.

In the final battlefield, he realized that self-survival was probabilistic, and instead of compromising with this "one's own luck", he chose to bear and face it, becoming the source of his own luck.

For example, in the face of the uncertain Heguang alms to his survival probability, Lu An did not draw that prize. Instead, choose to live again.

In the face of the salvation provided by the high-dimensional projection of Pan Ming, Lu An did not quietly and passively wait for the historical dead-end road he walked, and handed it over to Pan Ming to redeem. Rather, he did his best to leave a prologue for the redeemer.

It's easy to show strength to the weak. However, this is not necessary.

Lu An, who was in Pudong, never thought that there would be such an operation in the world.

Lu An was interviewing flat glasses at an optical shop at this time. The reason for running to the optical store to buy glasses is simple, Lu An discovers that his future college classmates are all four-eyed. Wearing glasses is almost standard for hard-working students.

In this world, there are always few geniuses who listen to lectures in class, finish homework quickly after class, and then have time to pack up and read idle books. At least in the twenty-second century, Lu An had never seen such a genius, and all of this kind of genius was sent to the Children's Palace to compete with geniuses of the same level.

Lu Ann considers that if you have any of your misfit traits in college, it is likely to give you more attention. For example, if you have a bald head at the beginning of school, you will always remember yourself in your classmates. Basically, the professor is in class, and the probability of naming you is definitely more than that of others. And you're going to skip class.

Lu An picked out his clothes and black-framed glasses, looked in front of the mirror, nodded and said to himself: "I wear glasses with the temperament of that person." ”

Jiangnan people are outstanding and will always have some great power. These powers also shine brightly in this timeline. The one Lu An was talking about was a certain great mathematician, Hua Luogeng. In China's modern and modern scientific community, there are only a handful of heroes.

And the subject that Lu An is about to study is very obvious, Lu An has an emotional attitude: "I want to go straight to the crown of science - mathematics" Speaking of this, Lu An suddenly admired his foresight.

Long before entering the world of energy, Lu An chose this major from Ji Liu, and it was because of the consideration of the algorithm design of his first-generation guide computer.

However, now, after more than ten years in the world of energy, many mechanical designs and industrial parameters are clearly remembered. On Luan's side, the application of the conduction system is also advancing by leaps and bounds like the technological explosion of the 21st century. For example, Lu An's mechanical wave computer technology has developed to the direction of large-scale integration of microbubbles.

If Lu An had chosen other disciplines, it would have been useful when he chose them, but now he is suspected of going the same way. However, when it comes to mathematics, it is by no means outdated. When Lu An chose at that time, he chose according to the best subjects.

Of course, the best discipline does not mean that employment is the best, on the contrary, the employment of mathematics departments in this world is very unpopular.

But that doesn't mean math isn't important. In the process of abolishing the compulsory foreign language, Lu An argued that many people do not need foreign languages in their lives, and foreign languages are used by those who lead foreign trade.

Contrary public opinion has turned up the theory of the uselessness of mathematics, and most people should cancel mathematics without advanced mathematical knowledge.

Yes, in the 21st century, many people do not have the opportunity to use calculus, just as most people do not use foreign languages because most people do not need foreign trade.

However, whether a discipline is useful or not depends on the needs of the market, and if a country's industry is not tourism and international finance, then the need for foreign trade talents is limited. But if a country is industrially manufactured, then the number of mathematical talents needed is almost unlimited.

From the middle of the 21st century onwards, it is sad that you don't have the opportunity to use advanced mathematics, which means that the nature of your work belongs to the easy part, not the important work.

In the first half of the 21st century, there is a very important discipline, the applicability of rotation, which is almost universally used in many technical fields. But it was not included in high school physics, which included the theory of relativity and the changes in the proton beam of nuclear reactions. But this discipline is the only one that has not been written. - Fluid mechanics.

The earth's atmosphere and rivers are fluid, and wherever there is fluid movement, this discipline must be used, meteorology, ship design, automobiles, airplanes, and aerodynamic shapes. Mixing of fuel and air in the engine. Diffusion of contaminants. The vast majority of phenomena in the human eye occur in a fluid environment.

But why doesn't such an important subject appear in high school physics books? Because it's so difficult, it's too hard to master the math used in such a subject.

A brief introduction to the level of mathematics required for this subject.

First, set up an XYZ coordinate axis system.

On this coordinate axis, any point of an air flow can be marked with three sub-directions: x, y, z, and z.

But what happens when this airflow point is hit by another airflow? Every point of air will bounce straight in reverse? No, it's not a straight line that springs in reverse.

Only in a vacuum will it bounce off in reverse, you in a vacuum, sprinkle a handful of dust, and every dust will bounce off like a bumper car after colliding with each other. But this is not the case in the air flow, but a vortex is formed between the air currents in different directions.

It's like smoking a cigarette and exhaling a cloud of smoke, and the edge of the smoke rubs against the air, forming a curved vortex. How does this deflected eddy current be represented in the formula?

The original air flow is subjected to an external force in the y direction of another air flow in the X direction, and the disturbance in this direction is expressed by a partial conductance formula of x and y, and the partial conductance formula of X and Z is also used to express the perturbation in the direction of x.

Then the direction of y is also analyzed in the same way, and the z direction is also analyzed in the same way.

In this way, the coordinate system is used one by one, and the disturbance in the three directions of the air flow is gradually analyzed from the three sub-directions.

The calculus that can get around a high school student's headache is at most a one-dimensional one-time partial derivation. And this one has three directions, so it has to be ternary.

You think that's the end of it? After normal fluids disturb each other, after forming a vortex, the vortex airflow also has vortex. If you want to calculate more finely, you need to perform a secondary bias.

Of course, there are eddy currents after eddy currents, so in order to be more refined, then a third deflection is required for each direction.

This is the most basic fluid formula, if it is a different profession, it is necessary to add other elements on these basis, such as analyzing the earth's atmosphere, such a large scale of geostrophic deflection force to consider, geostrophic deflection force and latitude related, well, the already complex headache formula has become more complicated.

Well, some people may say that they don't study meteorology, don't build airplanes, don't design ships. I don't have access to these industries, so I don't need these disciplines at all. So let's talk about the feelings of flying to the sky. Everyone wants to enjoy this thing, just like humans enjoy the convenience of the information provided by mobile phones.

In the second half of the 21st century, rocket backpacks that allowed solo flights had appeared, and literati often said that they should let people have wings and yearn for the sky. With the advent of free-floating technology, it must never be mastered by people with little knowledge, just as it should never be driven by people without a driver's license.

If you don't have a certain amount of knowledge, just wait for the spiral to go up to the sky, Brown to fly, and the upside-down onion to the ground. If you want to float in the sky, then it is necessary to learn some knowledge of fluid mechanics, otherwise the one-man aircraft will fail in the sky, and then if you do the wrong action, you will die.

Fluid mechanics is a widely used physics discipline, but it has been pushed back by mathematics. A lot of people have difficulty getting in. The same is true for other disciplines

There are also many subjects that need to be mastered by mathematics. Now Lu An has not thought about work, work is the bond between Lu An and this world society, and this bond is very bleak at present. Luan needed math because he really needed it. Your own superpower system requires a lot of mathematical modeling.

Mathematical modeling does not rely on computers alone, and what Lu An hands over to the computer is repetitive and tiring, while Lu An has to design algorithms.

Walking out of the optical store with flat light and black-framed eyes, Lu An took a breath: "Gao Shu, I'm here to challenge you." ”