Bu Tianzhen took the hovering train to the White Emperor Academy.

One of the four major colleges of the central government has the world-famous 'Tai Chi Square', which is divided into two halves of yin and yang by two vivid carps, half made of black crystal and half paved with white mica, which looks particularly chic.

Black and white.

The mystical is profound.

In the center of the square, there is another granite landscape stone tablet, on which there is a motto of the White Emperor Academy.

Good is like water.

Four words, silver hook iron painting, dragon flying phoenix dance.

Bu Tianzhen watched Tai Chi for a while, and then came to the White Emperor Library. The outside of the library was full of many students, and Bu Tianzhen felt strange that there was a large whiteboard outside the library, and there was a formula called 'the fastest descending line' on it. A group of students and even teachers from the White Emperor Academy gathered in front of this formula to meditate and think about what to write in their notebooks.

Bu Tianzhen looked at it and felt that this formula seemed to be seen somewhere. Seeing that they seemed to be solving this formula, Bu Tianzhen was not bothered, and quietly walked into the library. When handing the library card to the librarian, Bu Tianzhen asked casually, "What's going on with that formula outside?" Why is it so lively? ”

The administrator, a girl with a ponytail, was very delicate and spoke very quietly, and as she checked the records, she replied, "Oh, that's a question that several scholars from Plato's Academy came to exchange ideas about the fastest line...... I heard that it is difficult, and it is said that only five people in the entire West have proved it. Because there are many scholars in the library, I put it here, hoping that someone can answer it. ”

This formula has been in front of the library for a while, it is very lively, and the girl knows it very well.

"Mathematics? Is it hard? Bu Tianzhen asked a very silly question.

The girl raised her head and said strangely, "Of course energy math is difficult, this is a discipline that has only recently emerged." Seeing that Bu Tian didn't understand, the girl patiently explained.

Since Newton discovered the great law of universal energy, the whole world has entered a glorious period of energy civilization, and human beings have not only developed a powerful system of "energy warriors", but also applied the law of energy to every place in life.

In fact, 'energy' was discovered long before Newton, when Taoism in the Eastern world called it "true qi" and in the Western world Aristotle called it "elemental", although no one studied it thoroughly and thoroughly.

After Newton's thorough research, the energy warrior finally became a powerful being. Energy mathematics was born hundreds of years later, and the first person to study energy mathematics was named Euclid, who had the whimsical idea of using numbers to prove some of the principles of energetics.

These principles were then put into the research industry, and various energy principles were created and applied to human beings, which was the prototype of energy spells. The most famous is his "Geometric Original", which is a compulsory course for energy warriors, which records many classic geometric energy techniques, and "Pyramid Defense" is known as a classic in defense techniques.

As a result, energy mathematics began to flourish.

However, unlike the West, the East pays more attention to the combination of energy and body, paying attention to "splitting the mountain with one fist and breaking the river with one finger" rather than releasing the energy, so the study of energy mathematics in the Eastern world is very cold, and most of the energy spells are transmitted from the West.

In any case, the mathematics of energy deconstructs the principle of energy with numerical images, and is full of far-reaching philosophical atmosphere, and the three Western churches call it the ladder to God, the only truth in the world. This time, they had a friendly exchange and challenged with the latest mathematical formula of energy, which is afraid to prove that energy research is above the Eastern world.

After listening to the girl's words, Bu Tianzhen was a little speechless.

This developed civilization with hovering trains, space storage, and even dimensional movement is quite backward in mathematics.

Thinking about it, the mathematics of this world is based on the energy system and is in the service of spells, even if it is backward, it is a matter of course, after all, hovering trains or aerospace vehicles and even some science fiction equipment are based on energy, and they do not need too advanced principles.

"The Ancient Language Zone you're looking for is in the Seventh District." The girl entered the data into the card.

"Thank you." Bu Tianzhen put away his thoughts, he didn't come to the library to care about mathematics.

Bu Tianzhen came to the seventh area of the library, where the library is spread out in several huge rings layer by layer, and the books on it are engraved with marks, unlike the kind of library in the Earth University, the books here are kept in electronic storage, and there is no way to borrow the templates of the books on the shelves.

If you want to read, you only need to match the transparent magnetic card to the cover of the book, and then the card will scan the content of the book into the card in a few seconds, save and track it within the valid time, and then click the button of the magnetic card, and the reading interface will appear.

This borrowing system is quite simple and gorgeous, saving a lot of trouble.

Bu Tianzhen scanned a few ancient languages and literature and history into the magnetic card, and came to the last shelf of the seventh district, and a white creature appeared in the corner and startled Bu Tianzhen.

When I looked closely, it was a white camel kneeling on the ground, staring at Bu Tianzhen with two big eyes, chewing and humming a few times.

"Camels?" Bu Tianzhen thought that he had seen it wrong, and there would be a camel in the library.

Bu Tianzhen, who was still praising the library management system just now, was speechless, and even a cat could not enter the library to see a camel.

Bu Tianzhen noticed that a beautiful girl was leaning on the hump of a camel, the girl was wearing a very gorgeous dress, wearing the crown of the duchess, her skin was snow-white, and she looked very beautiful, with a pair of big blue eyes like a blue ocean, and she was looking intently at the book in her hand.

There are many students in the seventh district who are reading, but they seem to be used to it, and it is not strange for the girl to carry a camel, and some students even secretly stare at the girl while reading.

Bu Tianzhen shook his head, temporarily dispelled the idea of scanning books, and found a seat to start looking for literature.

Before you know it, the sunset is shining through the window.

A magnetic beep indicates that the library is closing.

Bu Tianzhen stretched his waist and yawned widely.

A camel voice came, Bu Tianzhen remembered that he was still in the library, and at a glance he found that there were only two people in the seventh district, one of them was the girl with the camel, she maintained a backrest posture, like a statue, her expression was not shocked, but when she saw Bu Tianzhen stretching her waist, she glanced at him curiously.

"I'm sorry." Bu Tianzhen scratched her hair, a little embarrassed to disturb the girl's study.

With a smile on the corner of the girl's mouth, she nodded slightly, her eyes were beautiful and she could speak, and then continued to look at the book in her hand, she looked very slow to read the book, as if every word was chewing on the meaning.

Bu Tianzhen left the library and saw the whiteboard again.

The whiteboard was still empty, obviously no one could answer it, and the students and teachers who were watching before also left one by one, leaving only the whiteboard standing alone.

The fastest downhill line?

Bu Tianzhen suddenly remembered why it was so familiar, this formula seemed to have been learned in high school. No way...... The math department in this world is not only high school? Step naïve sweat, standing in front of the whiteboard and looking carefully.

The formula for the whiteboard is very simple, a curve, with three points of amb, imagine that a ball rolls along one of the curves from point A to the lower point B, and it takes the shortest time to find a curve that is the time it takes for the ball to roll.

"It turned out to be a Huygens cycloid." It's no wonder that the steps feel familiar.

Tomb robbing requires a lot of physical knowledge, and it is quite accomplished in this area. Seeing that this whiteboard was a little dazzling, Bu Tianzhen didn't want to take out the chalk and solve a set of theorems on it.

After solving it, Bu Tianzhen blinked: "I don't know what spells can be invented with this theory." ”

……

Professor Qiu Wenshi looked up at the sky from the office, there was a lonely tone in the dusk, the old man exhaled in vicissitudes, stopped the work in hand, and there was a pile of white paper on the desk scribbled with various formulas and questions.

As a well-known scholar in the Department of "Energy Mathematical Conception Deconstruction and Reconstruction" of White Emperor College, Qiu Wenshi felt depressed when he thought of the challenge of the group of Western peers a few days ago.

The fastest energy drop line.

Qiu Wenshi sniffed out a change in the "energy spell" from this mathematical formula, but several scholars in the academy failed to get along with the key to solving the problem. According to John's energy scholars, they have also issued challenges in academic journals in the West, but only five people, including him, can solve it, and four of them are the top scholars of the entire Great Plane.

Ostensibly John came with the good intentions of helping to reform the 'energy' of the East, but in fact the test of the subject was more like a mockery of their primitive understanding of energy.

But this is also a helpless thing.

Energy spells are only a sideshow in the Eastern regime, and even though they are currently becoming popular among young people, the most powerful samurai still practice energy cheats and ** combinations.

Several professors from the Department of Energy Mathematics in the academy knocked on the door, "How is it, have you solved it?" Tomorrow the John Scholar will be gone, and it will be a shame if he can't solve it. Qiu Wenshi asked expectantly.

Several old men smiled helplessly.

"What about the other academies? Any news? ”

"There's no movement at the moment."

Qiu Wenshi sighed heavily.

"Lao Qiu, this can't be helped, we are still just starting out in energy mathematics, even if there are only a few people in the West, don't be discouraged, we will definitely surpass them in our research in the future."

"yes, even if those barbarians have studied the mathematics of energy thoroughly, so what."

"Forget it, tell someone to go to the library and put that piece away." Qiu Wenshi waved his hand.

"Lao Bai went by himself, and he was still fantasizing that someone could solve it."

"We can't solve it, how can the other students of the academy solve it, wishful thinking."

"Don't talk about it, this time I will discuss with them in a low voice the principle of this fastest energy drop line, maybe it can really make the energy reform."

"I'm afraid those barbarians are going to open their mouths again."

"No way, who made them too powerful in energy spells."

The elders were talking.

Suddenly, I heard a frantic scream coming from downstairs.

Listen to the voice, it's white.

It's not surprising that this old guy is driven crazy by math.

Everyone hurried downstairs, and saw a white-haired old man running over with a big board in his arms, he was holding the board and dancing, just like a child who had won a treasure, and many people in the professor's building cast strange eyes.

Qiu Wenshi was about to reprimand him, but he didn't know the severity, when he suddenly found that the whiteboard was full of formulas.

"Unraveled, untied!! Ha ha. Lao Bai shouted.

"What ???"

Several old professors were shocked, and rushed up in disbelief to take down the whiteboard, on which a set of formulas and concentrations were written, and the proof of the fastest descent line was demonstrated.

"Is this a cycloid??"

When they saw it, it was correct.

"Lao Bai, did you untie it?"

"It's not me, I don't have the ability, I went to the library to collect this board and suddenly saw it full of words, haha, I thought it was who was scribbling, it turned out that I didn't know who had solved the answer, haha." Lao Bai's face was flushed with excitement, it was the first time everyone saw him so excited, no wonder, this challenge didn't know how long it had been for everyone to forget to sleep and eat.

"Do you know who it is?" Qiu Wenshi asked solemnly.

Lao Bai was dumbfounded, he was so excited that the topic was solved, and he completely forgot who did it.

"It must be some student from our academy, right?"

"If it's not the library?"

"Hurry up and investigate, and we must find out who solved it." The silence of the academy was immediately shattered by the crazy behavior of several old men, but Qiu Wenshi knew that it might not be the only one that was broken.

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