"I also saw it in the arithmetic weekly newspaper of the Heavenly Sword Kingdom a few days ago," Liu Dun took out his Qiankun mirror, and then turned to the page that he browsed in it and handed it to Wei Gong, "The arithmetic society of the Heavenly Sword Kingdom will announce an arithmetic problem every once in a while, and if the previous question is answered, the answer will also be announced." It's like the last time Master Emiya solved the puzzle of how big the world was. ”

Liu Dun laughed proudly, as if it had happened to him, "That topic used to be a sensation, so it stayed in the weekly report of the Arithmetic Society for several issues in a row, and it is still at the top until now." However, the question released last week is also quite confusing, and no one has been able to answer it until now. ”

The arithmetic scholars of the Heavenly Sword Kingdom came up with a question that-

No matter how many lines are used to divide the plane into multiple regions or even infinite regions, then only four colors are needed to dye these areas, so that every two adjacent regions are dyed differently;

History is such an amazing coincidence that in any world, there will always be a group of people who exist to find the truth of the world, and there will also be a group of people who are fascinated by mathematics.

Emiya glanced at the question above and immediately understood, "This question is really difficult. ”

After he finished speaking, he handed the Qiankun Mirror to Jian Rin Sakura, and then circulated it one by one.

Her Majesty the Empress, Yuan Li, and the new Miss Shiyu were obviously not so interested in their conversation.

Cui Xiaoxiao glanced at it and handed the Qiankun mirror back to Liu Dun.

"Don't think about it, people in this world can't prove it."

Liu Dun was a little surprised by this little nonsense, and he didn't bother with her, but just cast his eyes on Wei Gong, "It seems like a simple question, it shouldn't be so that no one can solve it, right?" ”

Emiya shook his head, "The four-color conjecture seems to be a very interesting question and is easy to understand, but in fact, it is much more difficult to prove than imagined. It really can't be proven. ”

He goes on to say, "The four-color conjecture, another popular way of saying it: every map without an enclave can be colored with no more than four colors, and no two adjacent areas will be the same color. Two regions referred to as contiguous means that they have a common boundary, not just a common intersection. ”

Next to it, I drew it carefully on the ground with a twig.

"It's easy to understand, it's interesting, but is this topic really difficult?"

"Yes." Cui Xiaoxiao didn't raise her head, picked up a piece of salmon with chopsticks and put it in her mouth, "Don't think about it, this problem was first called the four-color conjecture, known as one of the three major mathematical conjectures in the world, and finally it was proved by people with computer aid." Now there are no computers, and it is impossible to perform such large-scale calculations and give definite and effective proofs by relying on manpower alone. ”

"Huh?" Wei Gong turned his head to look at Cui Xiaoxiao in surprise, "Even two hundred years later, hasn't this question been perfectly proven?" ”

Cui Xiaoxiao laughed, "That's right, those fools will only bury their heads in calculations, and always think that computer proof is a pseudo-proof, and the truly perfect mathematics should be concise and so beautiful that it makes people tremble all over." Listening to such disgusting words will give you goosebumps. Mathematics is the basis for solving the puzzles of the world, and it is also the forerunner of exploring the truth of the world, which is true, after all, many conjectures in physics may start with mathematics, such as the dimension of the universe. However, it is too narrow to be overly obsessed with the form of expression and to need concise and perfect proofs to be the real mathematics. ”

There was a sudden scorching heat in her gaze, as if it were about to burn, "The wheels of history will crush all the pedantic and everything that stands in the way of progress." The emergence of the computer is not only used as an auxiliary tool for calculation, it has played a very important role in the future development of mathematics. Moreover, in the 22nd century, the advancement of artificial intelligence has led to their ability to independently generate mathematical problems and solve mathematical problems, and extract data from normal human production applications and build mathematical models, resulting in stupid humans who are limited by human brain computing completely unable to understand the generation process and solution process of their problems, and human beings are overly panicked about artificial intelligence, so that the first robot war has evolved. ”

"......" Everyone opened their mouths in surprise and looked at the little girl.

"Ah...... I'm sorry, but my sister likes to have strange dreams and tell them as if they were true," Emiya quickly explained, "Just listen to it." ”

Although ...... instincts told them that they couldn't agree with Emiya's words, reason still made everyone nod in unison.

"The atmosphere is so good today, why don't I play a song with Master and cheer everyone up?"

"Okay!" Everyone applauded with joy.

That's why I hate partying with women.

Cui Xiaoxiao raised her head and looked loveless.

……

The setting sun stained the sky red, stretching the shadows of the crowd slantedly.

The petals of the dream fragrance flower floated in the air, and at this time they were plated with a layer of reddish gold.

Before you know it, most of the day has passed, and it's time to go home.

Kenrin Sakura came out of the bathroom and looked up at the sky, thinking to herself, what a wonderful day.

After that, I don't know when and when I will have such an opportunity.

"Your Majesty."

When Jian Rin Sakura heard the sound, she saw a red dress appear in the field of vision.

Lai Shiyu stood close and bowed slightly to her.

"Miss Shiyu." Kenrin Sakura nodded in reply, then smiled, "Thank you for saving my people." ”

"Thank you, Your Majesty, for letting Master Weigong help me forge my sword."

The two staggered, and Lai Shiyu turned around.

"Your Majesty."

"Huh?"

Kenrin Sakura turned to look her eyes.

"Your Majesty, there is one thing I would like to ask for, if there is any offense, please forgive me."

She paused for a moment, then shook her head with a smile and said kindly, "It's okay, but it's okay to say it." ”

“…… I want to ask, what kind of emotions does Your Majesty have towards Master Weigong? ”

“…… Ha? ”

Kenrin Sakura's heart skipped a heavy beat.

"Does Your Majesty only have a friendship with him, or a love of interests, or does he have some good feelings, and a little bit of love between men and women?"

Lai Shiyu's question is very straightforward, like a sharp sword straight into the heart.

Kenrin Sakura was also stunned.

She had never seriously thought about the relationship with the guard, and if she really wanted to say it, she really didn't know which one......

But the love between men and women ......

Jian Rin Sakura shook her head and smiled bitterly, "As the king of a country, I can't have the love of men and women. ”

She didn't answer me directly, did she not want to face it, or did she really not have this idea?

Lai Shiyu thought quietly, and then raised her head.

"I see. Your Majesty. ”

Kenrin Sakura looked into her eyes, and suddenly trembled-

It was a silent look with a fighting intent in it.

"If Your Majesty really doesn't want it, then you're welcome."