On Tokiwadai's campus, there seems to be an unusual gust of wind.

With a light tiptoe, the ground is still solid. However, at this time, there is a different kind of expectation, which is gradually spreading.

Close the folding fan and reach out to touch the formless. However, at this time, there is a sudden feeling that is rising from the bottom of my heart.

What, did you make a mistake?

As if stroking the invisible silk, after marriage, Mitsuko opened her arms and gently touched the soft wind.

With the movement of the wind, the footsteps of the marriage movement rotated. Like a dance, indulge in the traces of the wind.

"Classmates after marriage...... Dancing? ”

Didn't notice the whispers of classmates. Even if she heard it, she didn't know whether to agree or disagree.

In fact, it wasn't any dance, she just swirled along the trajectory of the simulated wind; However, it does seem to be some kind of dance, a gentle dance with the wind as a partner.

It's ridiculous that the advice given to Shirai at the beginning would be applied to him.

In the past, I used my ability to bind the atmosphere to create jets. But now, something that was never noticed in the past is being put in front of the eyes.

It's not a simple optimization equation, it's a new way of thinking. Rather than simply and crudely using certain equations and formulas, we use model simulations to understand wind from a larger and more macro perspective.

The model classification belongs to the cellular automata-lattice gas automata. It is a very effective model tool in the field of dynamical systems, the study of the overall behavior of systems and complex phenomena.

Stepping on the dance steps led by the wind, Chu Chu rotated gracefully after marriage.

Although the equation is no longer rigidly used, it is shown on a larger scale and more systematically. When you understand this model, you don't even have to use the capabilities at a glance. As long as the way it works, the system will naturally amplify it. While the strength of the ability has not changed, the effect has made a world of difference.

For example......

Stop the spinning and raise your arms slightly. The mathematical model in my head dynamically and systematically simulates a "result if you do this" in an automatic way.

After marriage, he slightly changed the trajectory of the gas movement around him. A moment later, the air flow that surrounded the lamppost in the distance immediately turned into a spiraling wind. Its form is in good agreement with the flow field distribution of the cylinder around the flow simulated by the model.

No, it should be said the other way around. It was because of the very good fit that she was able to do such a thing with ease.

The clear and easy simulation of flow fields with complex geometrical boundaries using the 13-bit lattice gas automaton model is just a simple application of the lattice gas automaton. More importantly, it simulates the evolution of the flow field system, so that after marriage, it is clear what to do and what the results will be.

I finally understood that it was a completely different way than what I had done.

That's the flow of the atmosphere itself. The wind itself, which is always indifferent to show its strength, but can never be fathomed.

The atmospheric system accumulates errors and shows a nonlinear amplification trend. It's really too difficult to understand the wind. But now, I know how the wind changes, and even how to use the system to use it. Using this model, the wind that is now everywhere is a force that she can change and use.

Yes, it's like Lorenz's famous "butterfly effect". The cellular automata-lattice gas automata is also a modeling tool for systems engineering and chaotic dynamics.

Weathered to one's own breath, the atmospheric movement is like the beating of a heartbeat. It seems that he has become a ......

“！”

When she was awakened by the exclamations of her classmates, she found herself in the blue. Before you know it, Tokiwadai is already under your feet.

When you realize it, you have already mastered the movement of the atmosphere, so flying is a matter of course.

I see, just like what Kaihara said that day, being able to know how to apply gas motion, flying is a very common concept.

What Kaihara-san once said, I was finally able to understand it when I was in the sky, and it was completely different from the feeling of standing on a high place.

However, her understanding of this is a little different from that of the dome.

Although the grandeur brought about by grandeur is common, in other understandings, after marriage and the dome are not exactly the same.

The sky is as beautiful as the otherworldly, as if it is full of poison.

Dome has an almost obsessive affection for the sky, but this is not the case after marriage. While she acknowledges its charming side, she also has a feeling of fear about it.

Why is there such a different feeling when you are in the sky?

Maybe it's because of the difference in the way they fly. In contrast, the way the dome flies is closer to the nature of the vast space itself, while the way it flies after marriage is to counteract the power of restraint with another force. So in terms of understanding flight, Dome is more positive than photon after marriage.

There is no direct change in the strength of the abilities that can be used. However, the model has brought about a new understanding of atmospheric flow, and at the application level, it has been a radical expansion.

What about other than that? After marriage, Mitsuko was a little curious.

I tried a little bit to simulate the flow field around the current using a 13-bit lattice gas automaton model, and based on that, I was able to construct the wind flow. If you take advantage of the characteristics of nonlinear chaotic systems, with your current capabilities, what can you do at most?

Thinking like this, she stretched out her hand towards the boundless blue.

Over Tokiwadai, the atmosphere began to rumble.

"Hey~ So that's what you said."

After the marriage, Mitsuko attracted the attention of quite a few classmates at this time, except for the dome who had noticed it for the first time, Mikoto Misaka, who came later, was also one of them.

"Well, yes, Misaka-san. After marriage, the way classmates used their abilities was quite simple, but she only achieved a LV.4 rating with such a single and crude way. Just from this, you can imagine how amazing the potential of classmates after marriage is. Maybe even maybe,She's the first aeromaker in the school city.。 ”

"But if it weren't for you, it would be impossible for your classmates to notice after marriage, right?"

"Maybe, but it's mainly up to the classmates themselves after marriage. Even if there is a mathematical model of lattice gas automata associated with it, it is generally difficult to put it into use in such a short period of time. After marriage, the classmate was unexpected, and he was a hard worker. ”

"In other words, it's like us."

For people who work so hard, Mai Trin doesn't hate it at all. Maybe it's because she's such a person herself.

Speaking of which, the same is true of the dome. When she first entered the school, Mikoto also had a period when she was very curious about Dono. During that time, she once flipped through Dona's papers, but after three pages, she was directly declared defeated, and she didn't even have a chance to resurrect the defeated department.

There is no opportunistic approach to the academic field, so it's definitely not just about having talent.

It was during that period that she learned how hard the Dome was. At least at the level of effort, there are really not many people who can compare to her.

In fact, this is also the consensus of Tokiwadai. She is definitely the hardest-working student in the entire Tokiwadai and the student who has made the greatest contribution in the academic field.

If it weren't for the complexity of the mathematical tools used in her abilities, she definitely shouldn't have stayed at the level of LV.4.

The relationship between them is quite good, but it doesn't just rely on first impressions. Their recognition of each other is the key.

However, at this time, looking at the figure of the married photon in the sky, Dome looked a little worried.

"To be honest, I'm actually a little worried. In fact, I must admit that this is the reason I am here now. ”

Her words startled Mai Sakato slightly.

"What does that mean?"

"Nothing." , Dome shook his head, "There is no problem with the model. However, nonlinear phenomena are not so easy to grasp, so it is necessary to be cautious and cautious. Especially at the level of application of capabilities, the interaction will make the result greater than the start, which will inevitably lead to an increase in the difficulty of control. ”

Linearity and nonlinearity are very different concepts. In the simplest way, linearity is like adding a ton of water to a container and then adding another ton of water, and finally the water in the container must be the sum of the two water additions; The simplest description of nonlinearity is to create an avalanche with a snowball that will have a much greater impact than that snowball.

For this, Mai Triin didn't know how to interface. Her abilities are primarily based on electromagnetic field theory at the applied level, while Maxwell's equations themselves are linear. Although there are some applications of nonlinearity, she doesn't know much about nonlinearity.

In contrast, the Dome clearly has a deeper understanding. After all, Einstein's field equations are inherently nonlinear.

At this time, the atmospheric motion simulated by the mathematical model of the lattice gas automaton also has nonlinear characteristics.

Dome Nai's worries are not groundless.

The agitation of the air began to increase in extraordinary form. What was originally a small spiral of wind is getting bigger and faster.

"Hey, it's ......"

Sensing some unusual signs, Mikoto Misaka was about to ask Dome beside her, but found that she had already flown into the sky. And, it's flying straight in the direction where the photon is after marriage.

In the clouds, there are traces of spirals, as if they were painted by someone.

That's not too unusual. Although the nature and intensity of the photon's own abilities do not change after marriage, the effect of the same force will be increased by the interaction of complex systems by applying fluid chaos dynamics through the lattice gas automata model. Essentially, this is a non-linear amplification process, which is one of the most well-known manifestations of the "butterfly effect".

Specifically, there is a tornado in the sky above Tokiwadai right now.

After marriage, Mitsuko was a little flustered. Although the lattice automata model had pointed out this trend, she was still a little overwhelmed when it actually appeared in front of her.

It's like a boulder about to roll off a cliff, that subtle state of instability. At this point, it tends to happen. As long as you know what to do, even if it's just a very small force, you can stop it. However, if left unchecked, it will inevitably happen. This is where the subtleties lie.

In theory, this is not uncontrollable. However, the way it is controlled is different from the process of canceling the use of power by the capable person in the past, because the energy contained in the wind now is beyond the scope of the photon that can be controlled after marriage. She needed to use the same reliance on the trends of atmospheric motion simulated by the lattice gas automaton model, so that she could disintegrate the overly intense atmospheric motion in the same nonlinear additive manner.

The problem is that now, she is a little at a loss, and this is very fatal.

At this moment, a pair of white arms gently wrapped up from behind her.

“？！”

This is actually unusual because of being in the air. But it seems to be a natural thing.

The owner of the arm embraced her tenderly.

"Come on."

The girl, who has become more and more familiar in the past few days, is hugging her from behind. That was the first true friend in her mind.

It's a simple touch, but it's full of reassuring magic.

Even thinking seems to have become clear and fast.

That's right, that's it. The fact that a chaotic atmospheric system can exhibit non-linear amplification means that it can not only stir up a storm by agitating the system, but also calm the raging wind in the same way.

Although it is not without limits, it is only to this extent, and it can never be said that it is beyond one's ability.

"Just kidding, you know I'm a married photon from Tokiwadai."

The open five fingers are slowly clenched. It doesn't mean anything, it's just a knee-jerk reaction. It's as if at this time, the reins of the violent wind are in their own hands.

The model of the lattice gas automaton is not simple, and the simulation and calculation of the motion of chaotic fluids are not easy. To be honest, after marriage, you even need to do your best to be able to do it, which is very hard.

However, this feeling is really very happy.

Master the movement of the atmosphere, and the changes of each step are clearly understood through the lattice gas automaton model. In this way, even if the interaction of chaotic systems brings about nonlinear amplification, it is still clear what the results will be.

It's like not running with your feet, but stepping on the accelerator of your car with your feet. It's not like running straight and you can stop with a single thought, but when you learn how to control the car's system with a small amount of effort, you can still accelerate and stop as you like. But its speed is not comparable to that of human beings.

The tornado, which had been whistling wildly and beginning to take shape, was rapidly quieting down. In the exclamation of everyone, the marriage completed the control of the wind. She created a tornado of incredible power and also stopped the formation of tornadoes. The violent wind was like a useful tool, at her disposal.

Although, the strength of her own abilities has not changed in any way, but other than that, it is completely different.

This is a realm that has never been reached by the air force, and now the married photon is already there.

Everyone confirms this fact, and after marriage, Photon herself is certainly no exception. But at this time, her first instinct was to quickly turn around and check on Dona's situation.

Her way of flying is to manipulate air currents, so there must be turbulence of violent winds around her body. For the human body, this is the intensity of the damage that can be caused.

But the dome is still as alive as ever, suspended in the air in a completely different way than the photon after marriage. The fierce wind was as if it didn't exist to her.

"Yes, married classmates, our Tokiwadai's Windancer."

She folded her hands with her fingers interlaced, her smile blooming like a flower, and her face was full of joy that could not be concealed.

Is it because that's the credit of her model? I'm afraid not.

It was really very pure, very sincere, and completely happy for the sake of the marriage photonic.