I am the empress, you still tell me to run away?

The most important thing is that now that he leaves Tiandu Beiluo, he can get a better understanding of the mountains and rivers of Dagan. If he has the opportunity in the future, he will bring the 15 Xiangzhou army to push Chen Wang.

As long as there is a suitable opportunity, you must never give up.

Having made up his mind, Lin Xuan sat down under the grape trellis and took a sip of herbal tea.

It is already September, and if he delays going to the Xiangzhou Army until October, he will undoubtedly waste more time.

Because of the bitter cold areas like Yanzhou, winter will come earlier, and the cold will also attract some tribes on the grassland to invade the south.

These must be prepared in advance.

Otherwise, the 15 Xiangzhou Army will completely become refugees who will disperse as soon as they rush.

I hope that those ministers in the imperial court who come from aristocratic families will work harder, continue to persevere, and let him go to Yanzhou as soon as possible.

As for the intentions of these people, Lin Xuan is also very clear. It is nothing more than thinking that it is too risky to arrange an assassination like Sima Zhao. The invasion of the clan and Chengjiang country.

In this way, he was only 17 years old, Le Xianhou, who only knew a little about reading, either died under the attack of the army of the Huan tribe in the grassland and the Chengjiang country, or fled ahead of time and died under the military law. There is always a way of death that suits him.

However, the premise of this conspiracy is that Lin Xuan really doesn't understand military affairs at all.

Helplessly, Lin Xuan thinks he still understands some basics, and it is also the military foundation for future modernization.

Although times have changed, there are many things that can be applied in this era.

Also, there are so many cities in Yanzhou, and there are many ambushes in field battles. If the ambush can't kill the opponent, they will defend the city. Lin Xuan also has some basic knowledge, as long as these cities are not just piles of dirt...

mound……

Lin Xuan took a deep breath.

This is really uncertain. If all the cities in Yanzhou are written on mounds, it will be a big trouble.

Anyway, wait.

Now, continue to teach the students of Guozijian.

For the next half a month, Lin Xuan taught mathematics in the Imperial College.

It is worth mentioning that a professor pointed out that most of the existing books are recorded according to the vertical version of the bamboo slips, rather than the horizontal version used by Lin Xuan when printing.

In this way, Lin Xuan's writing of the symbolic number "1234567890" will cause ambiguity, and even some other problems.

Lin Xuan thought for a while, and prepared a series of numbers mainly for vertical use:

"One, two, three, 〥, 〦, 〧, 〨, 〩, ten."

"Is this fancy size?"

A Guozijian student said.

Lin Xuan remembered this student, whose name was Rao Shaoyuan, who was from Ling County, Xiangzhou. There seemed to be some rice shops in his family, so it would not be too strange to recognize the flower code.

Because these are the figures that Lin Xuan specially learned when he went to Tiandu West Market, visited some merchants, and asked them about their daily accounting figures.

No way, with knowledge about these aspects, he only saw them in the future world, and did not study them in depth.

Fortunately, Dagan business is still widely used in this regard.

"That's right, this is the fancy code, both horizontal and vertical versions can be used."

Lin Xuan took out a few more digital calculations recorded using fancy codes for the students present to watch.

People who are just getting in touch may be a little uncomfortable with this fancy code, but after using it a few times and watching it a few times, it will gradually be regarded as instinct.

Of course, you have to pay attention when writing, especially the vertical version like one, two, three.

If it is not well written, it may become "three three".

At that time, if a number is wrong, it is very likely to cause great trouble.

Lin Xuan had a special account of these, and then continued to teach the students.

Lin Xuan also taught the two-digit, three-digit, and four-digit multiplication and division that several professors, teaching assistants, and doctors have been thinking about. He also taught some simple basic geometry by the way.

What parallel lines, perpendicular lines, equilateral triangles, right triangles, etc.

"The sum of the squares of the two sides of a right-angled triangle is equal to the square of the hypotenuse." Lin Xuan pointed to a picture of a right-angled triangle and said, "The smaller of the right-angled sides is the hook, and the other long side is the strand. The hypotenuse is a chord, so this can also be called the Pythagorean theorem, the quotient theorem."

"Shang Gao has a saying: hook three strands, four strings, and five."

"In simple terms, the square of three plus the square of four equals the square of five."

"..."

This math class once again left the Guozijian students present in a daze, and they couldn't believe it at all.

In addition, what is even more outrageous is that Lin Xuan directly came up with five or six methods to prove the Pythagorean Theorem.

They can barely understand the initial proof method.

But in the end, the proof method given by Lin Xuan, the great sacrificial wine, has become a pure scripture.

The most outrageous thing is that there is any Pythagorean Theorem that is just a part of the Cosine Theorem.

After Lin Xuan took out a few formulas of the law of cosines.

It's all numb...

"get out of class off!"

When the time came, Lin Xuan announced that get out of class was over.

Seeing that none of the teachers and students present responded, Lin Xuan didn't say anything, leaving the handouts on the wooden board and leaving the pages.

After a long time, some people in the whole classroom reacted.

"Murong Cheng, you are Nan Fengchu, you have been smart since childhood, did you understand the Pythagorean theorem just now?"

Someone walked over and asked Murong Cheng for advice.

Murong Cheng blinked and took a deep breath: "This student, I just listened to Dajijiu's lecture, and I'm still digesting..."

Damn, he won't!

Didn't you see that Beiwolong Lu Xueyi was there?

Ask him to go.

It just so happened that someone was asking Lu Xueyi.

Lu Xueyi is kind and kind, so he took out his book and explained the Pythagorean theorem to everyone: "Da Jijiu is really a god, if I hadn't learned a thing or two about the Pythagorean theorem in "Zhoubi Suanjing", I would not be able to understand it at all. "

"Everyone, please see, this is the cutting and mending technique that Dajijiu just mentioned briefly."

"During the Han Dynasty, there was a mathematician Liu Hui who said that hooking self-multiplying is the Zhu square, and stock self-multiplying is the green square. Let the in and out complement each other, each according to its type, because the rest will not move, and the power of the chord square will be synthesized. The square will be divided. , that is, the string."

"It means an arbitrary right-angled triangle. The red square is made of the width of the hook, which is the vermilion square, and the cyan square is made of the length of the strands, which is the green square. We first align the two squares of the vermilion square and the green square with the bottom edge, and then use the surplus to supplement the deficiency. The inside of the dividing line does not move, and the outside of the line follows its own category. The square of the composite string is the string square, and the root of the string square is the string length."

"This proves the Pythagorean Theorem, which can be understood at a glance."

"..."

Murong Cheng happened to see this scene and felt some pain in his face.

At this time, a student named Rao Shaoyuan stood up and asked: "Brother Lu, the Dajijiu mentioned three strands, four strings, and five, but not all right-angled triangles are in the ratio of three, four, and five. How should this number be calculated?"

Lu Xueyi was taken aback.

Other doctors, teaching assistants, and professors around also realized an extremely serious problem.

Some disciples from the Mohist School even became a little short of breath, and they didn't know what the problem was.

Because under normal circumstances, everything has a number and can be defined by numbers.

However, there is obviously a problem with the right-angled triangles left by the great sacrificial wine.

Just like the one nailed to the wood in front of you.

Lin Xuan specifically defines the length of the short hook as 1, so the problem will be big...

Regardless of the length of the strands, no matter how the length of the string is calculated, it does not look like a normal number.

Simply put, it cannot be defined by an existing mathematical number.

"This is how the same thing?"

"Why can't the string length be a normal number?"

"Yang Jianyuan, you are from the Mo family, you should know?"

"Professor, please explain to the students!"

"Feng Jijiu, don't go!"

Because of Rao Shaoyuan's problem, the entire Guozijian students, professors, doctors, supervisors, and Jijiu almost fell into a state of madness, especially those who were obsessed with mathematics.

"How is this possible? This is against the law of heaven!"

"How can there be unreasonable numbers in the world?!"

"What exactly did Lin Xuan, the chief sacrificial wine, teach us, does he know?"

Chapter 102 Gentlemen, Drink Up!

What Lin Xuan taught, he naturally understood.

It's just that mathematics is broad and profound, and it is impossible to teach it all in one class.

In just half a month, the mathematical foundation taught by Lin Xuan seems to be a mathematical foundation, but it will take a long time for them to fully digest it.

In this case, will it make people feel scalp numb if they take out physics and chemistry in the future?

But there are still many things in this world that Lin Xuan can't understand.

For example, Yujian, whether the warrior is too strong, and many other unreasonable things.

For these phenomena, Lin Xuan seriously doubts whether known science can explain them.

Even if it was possible, it probably wasn't something he knew that could explain it.

As for why you have to teach so hard during this time?

On the one hand, Lin Xuan used to have a habit of doing things from the beginning to the end. He felt that if he did something, he should do it to the end.

Just like when he used to be a planner in a game company, he had a backlog of work for a long time, so he worked overtime, and it was common to work overtime until the early hours of the morning, in order to get things done.

But Lin Xuan overlooked a very serious problem, that is, things can never be finished.

Especially the needs of game planning, the needs in the morning may change in the afternoon.

Or today's needs will change tomorrow.

So, under such a situation of often working overtime, Lin Xuan crossed over.

In this regard, Lin Xuan replayed many times, and finally got the truth of the reason for such a suspected time-travel.

Even after time-traveling, Lin Xuan still maintains this rare quality, which cannot be reversed for a while.

On the other hand, it was Lin Xuan who was moved by the spirit of seeking knowledge of the students, doctors, and professors in the Imperial College.

If he really went to Yanzhou to command the Xiangzhou Army, the chances of returning to class in the future would inevitably decrease.

Therefore, it is better to teach as much as you can.

In addition, Lin Xuan still hopes that these basic mathematics can have some impact on the shipbuilding industry. As long as it is convenient for future travel plans, he will spread it very generously.

After all, as long as he can't beat or kill King Chen in the future, there will be absolutely nothing wrong with making another plan to escape.

As for now, fishing, grilling fish, and enjoying the shade under the grape trellis will do.

……

Hall of Supreme Harmony.

At the court meeting, the debate on the matter of "replenishing the title without military exploits" has lasted for more than half a month, especially Yang Xiu, the servant of the Ministry of officials, I really don't know where the courage came from. open.

The ministers who represented the interests of the aristocratic families were a little confused by this situation at first.

However, since they supported Lin Xuan to command the Xiangzhou Army, they could only reluctantly support it.

Still, it's up to debate.

After all, Yang Xiu, an idiot, has to bring up the ancestral precepts every time he debates. Isn't this slapping the Empress in the face?

What the harem is not allowed to participate in politics, what eunuchs are not allowed to participate in politics, etc., all the ancestral precepts set by Emperor Gaozu were smashed by the empress Ji Handan.