On the stage, Jia Rong completely ignored Xia Yu's intentions and began to make jade Yin glue.

His movements were fast, and after the incomparably uniform and fine jade yin sand powder was put into the source energy thermometer, he was not seen to enlarge the observation window to investigate the changes in the jade yin sand powder, and directly and directly controlled the temperature with only experience to ensure the formation of the jade yin gum.

It's so easy!

As a 3-star mechanic, it's not difficult to make a 2-star source box.

It didn't take long for the jade Yin glue to take shape, and Jia Rong didn't take a break, and directly mobilized the sensing cyclone in his mind, preparing for the most critical condensation operation.

The construction of the Xuan arc structure, the basic framework is not too difficult.

But the difficulty is to accurately grasp the rotation rate and maintain stability. In Qu Bailing's laboratory, there are no more than 10 people who can understand and complete this step.

Xia Yu is of course one of the 10 people, but at this time, he is still in a "daze".

In his mind, a structure in the shape of a spindle-like body had taken shape, and was slowly turning under the fluctuations of its perceptual tentacles.

Diffrative space.

This is the name given by Xia Yu to the analysis mode that gradually improved the function after the success of this "modeling".

With this "derivation space", Xia Yu can directly deduce the effect in his mind without making the source array structure and verifying the effect.

Because he had been studying this Xuan arc structure before, and had carefully studied all the information left by Master Qu, Xia Yu now knew 23 different Xuan arc structures that could be stabilized.

However, the difficulty of the Xuan arc structure where Qu Shi's bed is located lies in the fact that the rotation frequency of its source array lines is not static, but constantly changing and circulating.

This means that these 23 stable structures correspond to 23 different and varying frequencies.

"If these frequencies are listed numerically......"

Xia Yu slightly urged the perception, and 23 groups of numbers suddenly appeared in the space.

Sure enough, each stable structure corresponds to a series of numbers, which are periodically changing, which is equivalent to its rotational speed constantly circulating with time. ”

Well, from a mathematical point of view, these 23 stable structures correspond to 23 sets of periodic functions, and the independent variable is time. ”

In Xia Yu's "Derivative Space", the stable structure selected by Qu Shi for the "Six Locks and Armor" corresponds to the first group.

By the way, Jia Rong deduced and cracked the Xuan Arc Source Array structure according to the "Six Locks and Armor", which is equivalent to him finding a set of functions based on the masses.

So what do these 23 functions have in common?

Xia Yu felt that he had vaguely grasped the most essential problem of the Xuan arc structure.

As long as we find out the common law of these 23 sets of functions, we can know the conditions under which the Xuan arc structure can be stable, and perhaps more stable structures can be deduced according to this law.

This is the core theoretical framework of Qu Bailing's entire Xuan arc structure, and it is a field that he himself has not fully understood so far.

It's just that......

It's a bit difficult to deduce the function ontology from these numbers alone.

............

"Look, Master Jia Rong is making the source box, it's really pleasing to the eye!

"I guess I regret it, right? It's not who plagiarized whom, Jia Rong must also know about this source array, even if Qu Bailing was resurrected, it's about the same level as him!"

"Hey, this kid is bloody, it's just a mantis arm as a car, delaying time......"

Seeing that ten minutes had passed, Xia Yu was still standing motionless on the stage, and many onlookers were discussing.

Even a few 3-star masters who had a good relationship with Qu Bailing were all worried about Xia Yu.

Lao Qu had a rough life, and it was easy to receive a good disciple, but it would be a pity if he folded it here.

Moreover, even if Xia Yu can make a source box at the same level as Jia Rong, it can't be whitewashed for Qu Bailing!

Maybe it's really the mantis arm as a car?

No, Xia Yu didn't have time to think about this now. His mind has been completely filled with 23 sets of periodic functions, and the "derivative space" is full of constantly changing numbers, one by one circulating to cooperate with Xia Yu to perform high-speed calculations.

"Periodic Function, Periodic Function ......"

He pondered and meditated, feeling that he was very close to the answer, only a burst of inspiration, as if he could gain insight into the essence in the next second.

But in an instant, it seemed to be confused, and all the data in the "derived space" disintegrated, and there was no clue.

Damn it!

What the hell is that aura?

Periodic Function ......

Suddenly, a sentence flashed through his mind - "Any periodic function can be seen as a superposition of sine waves of different amplitudes and different phases." ”

That's it!

Is this Fourier's point of view or Euler's?

No matter what, it must be it!

Xia Yu was ecstatic, the perceptual vortex was running wildly, and the 21 perceptual antennae instantly evolved into a new "derivative space", and then the 23 groups of numbers reappeared, gradually forming periodic curves on the number axis according to the period.

He focused on the first curve, which was a function of the frequency of rotation of the line of the "Six Locks and Armor" source array.

No way!

Xia Yu was completely speechless, isn't this the simplest fucking sinusoidal curve with amplitude!

Yes, isn't every irregular number a function value corresponding to 1 rad of the arc structure?

It's as simple as that?

It's impossible, Master Qu has already obtained so many sets of stable structures, even if there is no "derivative space" deduction, a little bit of calculating the function characteristics of these numbers can always correspond to the sinusoidal function!

Wrong!

Xia Yu suddenly realized that there was a fundamental problem.

In the journals of Popular Mechanism, even some of the masters of the mechanism with green or even yellow leaf emblems rarely used complex mathematical language when describing some problems, and more often used natural language or source array symbol clusters to display.

From his limited observations, the level of mathematical development in the world of institutions has not even reached the level of the end of the 19th century.

No way!

This conclusion shocked Xia Yu, but in retrospect, he felt that it was very possible.

Try the other 22 structures again!

In ecstasy, Xia Yu immediately brought all the 22 functions into integer radians in the "derivative space", and calculated them one by one, sure enough, all these 22 functions correspond to trigonometric functions of different amplitudes!

This conclusion is incredible!

He couldn't hold back his excitement, and constructed a trigonometric function by himself, randomly selected an amplitude, brought in the radians one by one to get a set of values, and then simulated a Xuan arc structure in his mind, and turned its lines little by little according to this set of values......

1 second.

2 seconds.

5 seconds passed......

It worked!

This value of rotational frequency, which is almost arbitrarily withdrawn from the trigonometric function backwards, is also aimed at a stable arc structure!

Other words

These trigonometric functions obtained from the rotational radian period are the core mathematical framework of Qu Shi's entire Xuan arc structure, and they are areas that he has not completed himself.

It's not that he hasn't studied deeply enough, but he really doesn't have a trigonometric tool that can bring the rotational arc into for his reference!