It's not that hard to open a hospital in another world, right?

Chapter 1377 Teacher, don't run away!Say yes you will help me! (Monthly ticket plus 1)

Gretel also wanted to ask the teacher, if you know Fourier transform, if not, I will teach you—but he didn't dare.

Ask rashly, when the time comes, the teacher will give him a three-shot, deadly question:

"Why is this formula called Fourier transform?"

"Where did you learn it?"

"How do you know that this formula works?"

If he can't answer a single question, he's looking for death!
Alas, it's all his fault for not paying attention to the progress of magic before the council, as well as other progress.

If he had often flipped through papers and noticed the mathematical achievements before the parliament, he would not have such a headache now.

There was no way, Gretel took a clam shell, a map, and a basic signal from the teacher, and plunged into the library of the Magic Academy.

After searching desperately, Gretel found helplessly that, at least in the records of the Elf Magic Academy and the parliamentary journals collected by the elves, there was no relevant record of Fourier transform.

"What are you doing, Gretel?"

Looking at the teacher again, I still feel a little unsafe.After thinking about it, he summoned a floating disc, lay down on it, and began to deduce the operation method of the Faro quadruple pig on the spot.

Gretel lifted his head feebly.His face was pale, his eyes were dull, and his bangs were flattened on his forehead.

"I'm counting..."

Even though Gretel had the physique of a level 14 natural priest, he still felt that his waist was sore and his legs were weak, and he was very tired.While the teacher was not paying attention, he quietly took half a step back, summoned a floating disk, and sat on it.

It wasn't the Lord of Thunder who had set up a barrier in advance, Gretel dared not say that he could withstand the aftermath of this blow...

The silver dragon girl quickly discovered the change in Gretel.During this period of time, he buried himself in his study, neither reading spell books nor practicing magic.

Who knows what inspiration the teacher got from the formula?
The application scenarios of Fourier transform are very wide, such as physics, number theory, combinatorics, signal processing, probability, statistics, cryptography, acoustics, optics...

Amidst the huge sound of the wind, Yinlong's crisp muttering could still be heard, and it kept coming:
"Bad Gretel! Don't take me! I won't take you to fly next time! - I will fly by myself and see who is faster! Maybe you are faster than me, hehehehehe!"

On the second page, I glanced at it again. The expansion and transformation of trigonometric functions should have been known for a long time at the level of the little guy;

Well, you're here to help me!

"Teacher!" He raised his head reflexively and shouted:

Let's not punish him here, okay?
However, the Lord of Thunder has already stood still, with a look of wandering in the sky, with only a trace of soul still on the booklet.

"You're fine." The huge waves rolled and turbulent.The Lord of Thunder turned his head to look at Gretel, the blue light on the monocle was shining brightly, and there were still tiny electric sparks dancing:

One second, two seconds, three seconds, he flashed beside Gretel, raising his hands to build barriers.

Teacher, do you plan to spend a few hours or a few days to figure out all these formulas?Let's go to the study and have a look, shall we?Let's sit and watch, shall we?

From red to yellow, from yellow to white, from white to blue, from blue to blue, from blue to purple.

Gretel lamented in his heart, and he could only stand respectfully and stand sideways as punishment. 10 minutes, 10 minutes, half an hour... an hour...

Gretel had a frowning face, and his head was as big as a bucket.

"what happened?"

As he said that, his figure disappeared in a flash.Leaving Gretel stretching out his arms in vain, looking up at the direction where the Thunder Lord disappeared:
Hey, teacher, why didn't you agree with each other and just ran away like this!

Whether this booklet is thick or thin, it has dozens of pages!
Dozens of pages, Fourier transform, various variants of Fourier transform, what is in his previous life textbook, what he has seen elsewhere, what he can deduce, are all on it!

Gretel didn't hear her moaning at all.In a hurry, he followed the path pointed out by the ancient tree, teleported all the way, and chased after him.

Tree walk!
Tree walk!
Tree walk!
The big and ancient trees nearby opened the way to me, allowing me to catch up with the teacher's footsteps!
"Bad Gretel! Don't take me!" Cerilla stomped her feet angrily.As a silver dragon, her affinity with nature has not reached the level of Gretel, nor has she learned to teleport through the big tree——

　Thanks to @TaxolYang for the reward of 666 starting coins

"Teacher seems to have gone to the beach..." Cerilla whispered.Gretel looked up in the direction she pointed, turned around and ran, crashing into the nearest big tree:

Cerilla couldn't even get in the door, she stood on tiptoe, scratched at the door, and shouted inside with her head.While shouting, at the same time gather a force field wall to block the wind outside the door:
There must be no wind blowing in!
There was a wind blowing in, messing up the manuscript paper, and Gretel couldn't find it when he turned around, disturbing his thoughts, and it caused him a lot of trouble!

I deduced... oh no, copied... oh no, it took me a month to get familiar with these formulas, teacher, you have to use it for a day no matter what!

Gretel grinned.He also learned about Fourier transform in college—he really learned about it, and advanced medical mathematics, and he didn’t skip this lesson.

"Convergence properties...symmetry properties...parity properties...linear properties...time shift properties...frequency shift properties...scale transformation properties...convolution theorem...time domain...frequency domain..."

It is so difficult for him to re-familiarize and deduce the formulas according to the textbook. How difficult is it for Fourier to create these formulas...

Not to mention, he has to explain clearly to the teacher why there is this formula, what is the essence of this formula, and what can it be used for...

Heart anatomy, cardiac electrophysiology, hemodynamics... therapy, encouragement, anesthesia... In Prince Anio's heart, those small dots, those cord-like foreign objects...

The problem is that there is still a gap of thousands of miles between what he said in class and what he can grasp now and use the formula to calculate MRI images.

On the monocle, the blue light flickered crazily, and small dots as fine as sesame seeds rolled at high speed. For a moment, an unknown number, formulas and curves rushed down the monocle like a waterfall...

Look at it and look in.The fingers turning the booklet are getting slower and slower, and the time of staring at them is getting longer and longer.

Teacher, don't run away, teacher!return--

The Fourier transform is still a particularly complicated formula!It has various variants in different research fields, and each variant is enough for Gretel to drink a pot!

The pile of manuscript papers on the desk ranged from a few thin sheets to a stack of knuckle-thick ones;
Then, from a stack thicker than a knuckle to a stack half a palm thick;
From neatly stacked to flying around, on the table, on the cabinet, on the chair, on the floor, everywhere...

However, even if it is a computer, it still needs to enter the program!

Teacher, although you are a legendary mage, your mental power is extremely powerful, and your computing power is about equal to a computer... If it is not a supercomputer...

Here to help with the MRI!

I don't know how long I have been busy, and there is a thunderbolt, tearing the silence.Gretel suddenly raised his head, and saw a bolt of lightning descending across the sky, shining through the sky and the earth, and within the lightning, the Lord of Thunder had disappeared...

Gretel stood by in fear, staring at the teacher.Teacher, you look like this, don't you want to stand here and understand the Fourier function completely in one go?

The Lord of Thunder opened the booklet with a puzzled expression on his face.The first page, at a glance, is full of trigonometric functions, nothing special;

Gretel lamented, while admiring the achievements of his predecessors, he buried his head in the study day and night.

There was a loud bang, and the entire sea surface suddenly sank, and then, the overwhelming shock wave swept the huge waves and rushed towards them!

Well, when the teacher comes back to his senses and sees that I am busy, he will definitely not dislike me for not accompanying him to stand as a punishment!
The shadow of the sun slowly moved across the mid-heaven, and then slowly slanted westward.At the beginning, Gretel still glanced at the teacher from time to time, but gradually, he became more focused and devoted himself wholeheartedly to the surgical deduction.

Then there is no way, he has to come by himself.

　　In December, 12 monthly tickets were owed, and 8000 monthly tickets were owed, and in January, 14 monthly tickets were owed, and 1 monthly tickets were owed, and a total of 6000 monthly tickets were owed.

"You should study for a while first. Your formula has given me some ideas. Your senior brother's project can almost be completed..."

Every property is described by a formula, and every formula, even if it is in the textbook of the previous life, he has to figure it out by himself before talking about it!
Alas, he is so difficult...

What surprised Serila even more was that he didn't even have surgery!

"It's not... I'm really fine..."

Gret wrote and drew, too busy to look up.The light around him gradually dimmed, and several balls of light quietly rose up to illuminate him, and he didn't even feel anything.

Even though the power of nature nourished him day and night, so that he didn't have dark circles around his eyes, he was crushed for three days and three nights, and hung on the cliff for seven days and seven nights, still made Cerilla feel very distressed:
"Grete, what's the matter with you? If you can't figure it out, don't forget it. Let's take a rest first, take a good bath, and have a full meal? Look at your current appearance, don't figure it out, and exhaust yourself first Already!"

On the third page, expansions, transformations, and curves of trigonometric functions.Interesting, it seems that no one has explored this direction...

"teacher!"

These big guys, if they have the chance to cross over, everyone can become a legendary mage, right?
After struggling like this for a month, when the Lord of Thunder came to check his homework next time, he was finally able to take out a thin booklet and send it to the teacher:

Suddenly, the silver light exploded, enveloping her whole body.The silver dragon spread its wings, and the two wings fanned the wind, soaring into the sky.

With the howling of the wind behind him, Cerilla regained her human form, and fell to the ground lightly, next to him.Gretel shook his head blankly:
"I don't know. Teacher..."

Chasing all the way to the beach, I saw the Lord of Thunder standing far above the waves, with the wind and clouds surging in front of him.A huge fireball was hanging in front of him, spinning continuously, gradually getting smaller, smaller, smaller...

Every day, every day, I lie on the desk, write and write, calculate, write and write, and calculate...

The purple became deeper and deeper, and gradually, Gretel could no longer see the fire bead, but the majestic pressure became heavier and heavier.The sea surface one kilometer away was so heavy that he couldn't breathe.

"Teacher... this formula may help you..."

Before finishing a sentence, the Lord of Thunder suddenly raised his arm, made a throwing motion, and then retreated rapidly.

And initially, it was proposed as a tool for analytical analysis of thermal processes, thermodynamics, etc., and the plastic energy system is very closely related, right?

　　For the rewards and other rewards from all the leaders, a total of 56 rewards and more are owed.

　　A total of 80 plus changes are owed, and the first one is paid today.

　　The cat... will definitely pay back!

　　Grip!

　　
　
(End of this chapter)