Many people in later generations are afraid of the same cage of pheasants and rabbits, called elementary school nightmare, are actually not a topic for later generations.

This question comes from "Sun Tzu's Sutra".

Of course, no one knows who this grandson is, but it is certain that he is not Sun Wu.

Cheng Zhiyuan decided to do this arithmetic that made countless people scratch their heads.

Although he knew, this would definitely not be a problem for Long Su.

Long Su has great wisdom, and it is not something that can be trapped by such a simple topic, so what Cheng Zhiyuan wants to tell her is not such a simple thing.

There was no sound in the entire lecture hall. The scholars and ministers stared at Long Su's hands, looking forward to the answer to this question.

Long Su put down his pen and ink, raised his eyebrows with beautiful eyes, and presented the file to Cheng Zhiyuan with both hands.

"I understand this way, first ask for the pheasant. I don't know the number of pheasants, the number of rabbits is also weak, and the pheasant has two feet..."

"Therefore, pheasants have twenty-three numbers and rabbits have twelve."

Long Su still explained the answers in the file, and even the methods, using the assumptions she is best at.

Cheng Zhiyuan said: "Yes, that's exactly what the answer here is."

Long Su was a little surprised and thought to himself that this guy who likes to talk about sophism accepted her answer so easily without continuing to make some strange arguments?

She felt a little puzzled and was even more curious.

"I have calculated that I don't know... Can I answer my previous questions?"

"How to solve the twenty-one questions in the world or the ten questions of Huizi based on numbers?"

Cheng Zhiyuan stretched out his hand and made a stop: "Master Long Su, don't be impatient."

He looked at the scholars: "Everyone, can you see the truth?"

Someone said at this time: "It's so troublesome to count by yourself, but this is just an appearance."

"If I were in Xianyang, thousands of miles away, but I wanted to calculate the pheasant rabbit in Linzi, then this method would be very good!"

"And the pheasant rabbit is just a decimal number. If you convert this number into an army... thousands, tens of thousands, or even hundreds of thousands, the so-called iron cage is like a certain city..."

"The array of soldiers can change numbers, compared with the past, it can even be accurate to hundreds, ten, or even one person!"

"I am thousands of miles away, but I use numbers to calculate the mechanism! All possible methods in the world are in my control. In the face of such calculations, the troops are chessboards... It is really a small way!"

This person stood up and looked surprised. After speaking, he talked endlessly. Cheng Zhiyuan looked around and someone laughed at this time.

Feng Ye said: "You are a military strategist?"

The man turned around and bowed: "No, he was just a little interested in it."

Feng Ye nodded: "That's a strategist. It's good. You can teach me if you learn from one thing and get it back."

The man said, "I'm here to Su Ziwen."

Feng Ye did not think there was anything wrong with this name, and many people present did not think of it.

But a few people paid attention to him.

Long Su is one of them.

A stalwart?

She blinked, suddenly thought of someone, and then thought about something.

Su Ziwen?

Zi Wen?

The Analects of Confucius describe it, and the Zi is warm and "harsh"!

Long Su looked at the man, and the man smiled at Long Su and bowed.

His cheeks are wide, heroic, soft eyebrows and pill eyes, eight feet tall, like a jade-towered pillar, half a green robe, and topaz tassels.

Su Ziwen...Su Li! It is not the Su surname of Tushan clan! Su Li is the fourth brother of Su Qin!

Long Su couldn't help laughing and was surprised. He was a great Grand Secretary of Yunmeng and had an identity in Jixia Academy! He had never heard of it!

However, she did not expose the other party here, but just sighed in her heart and thought to herself that Yunmeng's military and Zongheng, the ones (spy) that were out of the room were indeed everywhere.

Cheng Zhiyuan took two steps forward at this time: "Su Ziwen said it is also good. The military formation, or array, can not only be used for military tactics."

"The change of numbers is also an array."

As he said, he explained to Long Su: The Master had asked before, how to solve many paradoxes by using the method of numbers. Since that is the case, I will first talk about a foot of the slab."

"There are infinite numbers in the world, and the part is the whole, one-foot-long meter, one-half, and it is still a whole."

"So, this is another half, and the half that was cut off before is also one half."

"One half, cycle, half of it will be taken every day, and it will last forever. I wonder if the masters, after all ages, how many times has this stalk been divided into?"

"Try to construct a sequence based on this and find its limit."

Cheng Zhiyuan asked her, and Long Su was about to say how could he know this? It was nonsense, but when she spoke, she immediately realized something was wrong, and a light flashed through her mind and blurted out:

“Yes, yes?!”

one?

The officials were uproared and spoke one after another, because this was an infinitely divided topic in any case. How could it be one?

Put more than one object with unknown number into a box with unknown number, and at least one box contains no less than two items.

Cheng Zhiyuan said: "How did Long Su know?"

Long Su was stunned. She opened her mouth but didn't know how to explain it. It was like a flash of inspiration urging her to answer, and she herself was sure that this was correct! This feeling was simply incredible!

Cheng Zhiyuan stepped forward and approached her. Long Su was shocked, but he did not lose his composure in front of everyone, so his body was stiff, but he did not retreat.

"A gentleman should think twice before he acts?"

Cheng Zhiyuan's voice was not loud, so only a few people in front of him heard it, but they didn't notice anything, just smiled. When someone asked what was going on, the person in front said, "The Master of the Taixue is talking bad about Confucianism.

.”

However, when talking about bad things about Confucianism, we must also distinguish which one is. For example, if you scold Zhongliang, how could Le Zheng, Yan, and Meng, and it is too late to get rid of the problem.

But Long Su naturally knew what this meant.

Her beautiful eyes glared, flashed left and right on Cheng Zhiyuan's face, and said angrily and unhappy: "I... I haven't thought twice before!"

Cheng Zhiyuan nodded: "The light of inspiration suddenly appears, believe in your own judgment."

Long Su was unknown, so he retreated a little, which was to perform a ritual.

Cheng Zhiyuan said: "In mathematics, most calculations come from this spiritual light. When the door that has been locked for many years is opened, the first ray of light will surely refresh your heart, warm and comfortable! Don't doubt that your answer is correct!"

Cheng Zhiyuan pressed down his palm and expressed his affirmation: "Limited things can be divided infinitely, but they are also a whole. finite is both infinite, infinite but also limited."

"If the limit of the sequence exists, the limit value is unique. The process of changing numbers is constantly approaching a certain value, and this value is the limit value."

Cheng Zhiyuan looked at her: "Now, you can ask for this."

Long Su said: "How can I know what this one is?"

Cheng Zhiyuan said: "Yes, so, you don't know, can it be solved so easily?"

Long Su thought about it, shook his head, and then said, "But this is something that does not exist in reality..."

Cheng Zhiyuan said: "It does not exist in reality, but in numbers, it exists! It is true and accurate!"

He said to the side: "Yiren, take two pens and ink books."

Yi Ren quickly presented him, and Cheng Zhiyuan drew a curve chart on the book slip and then showed it to Long Su.

Immediately afterwards, he took another book and drew a circle on it.

Long Su's eyes moved and she said, "You... are you...Yipan (pi)?"

Cheng Zhiyuan said: "Yi Pan? Are you talking about pi? Do you know how much this is?"

Long Su said: "Yuan Sheng once did it, it was... three." (Note: In the 12th century BC, some people in China made a pi equal to three, which should be Zhou Gongdan, because Shang Gao and Zhou Gong discussed the area of ​​the circle.

)

Cheng Zhiyuan said: "It's very close, but a bit rough. In fact, this number is not enough to be calculated, it is an infinite number."

"The infinite, without boundaries, pi, that is, the Yi disk, is an infinite, non-cyclical number."

Cheng Zhiyuan added a dot behind the three, and then wrote the famous "1415926".

"You can continue to calculate, the algorithm is like this..."

Cheng Zhiyuan wrote down the algorithm in the big circle and handed it to Long Su. After reading it, the latter was speechless for a long time. When Cheng Zhiyuan took the file to Yiren, she spoke in a complicated way: "What do you mean."

...Zhou Yi is not as accurate as Lianshan?"

Cheng Zhiyuan said: "It is the universe made by Huangdi. Without Fuxi's Lianshan accuracy, King Wen's improvement of Huangdi's hexagram is already a remarkable progress. It is a shocking thing to create something out of nothing, but King Wen is not creating something out of nothing, but he is standing on the giant's side.

Although the world you see on your shoulders is vast, it still has its limits.”

"Fuxi is not the case. Although the heaven and earth he saw were only a piece of his head, his spirit urged him to write Lianshan. He stole the mystery of the sky, worked hard, and created the unparalleled Yishu that was not seen in the world."
To be continued...