These days, Li Yuanjia wrote another addendum to mathematics.
In fact, it's not much of an addendum. After all, in addition to the ones that have been taken out, Li Yuanjia still has a lot of mathematical knowledge in his head. He can even explain a concept in calculus, let alone the knowledge reserves of junior high school and high school.
, what he still remembered has long since become a hidden treasure in the study.
This article was written specifically for Zhang Jianzhi and Li Tai.
Of course, in addition to these two boys, Li Yuanjia will also ask Han Lucheng to save the manuscripts and let the craftsmen at home slowly carve the engravings - in the future, if he saves enough for a book, he will print them out.
As the seventh volume of mathematics, take it out and sell it slowly - when you think about this set of the most advanced mathematical theories in the world, you have to rush to give it to others to learn, and at the same time put it in the Xinhua Bookstore and people complain about it, Li Yuanjia
I felt so depressed and uncomfortable.
But there is no way, who told this to be China?
Our ancestors were not bad at mathematics, and tools such as calculations could also meet their daily needs. Naturally, they would not be too interested in foreign Tianzhu numbers. Otherwise, history would not have waited until more than a thousand years later.
When China began to lag behind Europe in all aspects and was constantly being beaten and punished, Arabic numerals were spread and developed with the introduction of science.
Now that there are people who are willing to learn, Li Yuanjia naturally has to pay enough attention to them.
So after eating a fairly hearty hot pot meal, Li Yuanjia sat back on the chair in the study in the afternoon and began to think about what to write in the next "Supplement". In fact, there was no need to think about it, he just picked it from his own inventory.
Just pick and choose and put together some things that are useful in this era.
Time flies when you have something to do.
Unknowingly, Princess Han's car drove back to the house, and Fang Fengzhu went directly to Li Yuanjia's study, and then recounted what happened during the day.
"Have you explained all the disadvantages of the fire bed clearly? Do they all understand?"
Li Yuanjia frowned slightly and asked lightly.
"Well, I made everything clear."
Nodding, Fang Fengzhu said with some anxiety: "And they all understood it, but... most people said they would make a decision in a short time, but there are a few people who want to make one now. After all, this is
The fire bed is not something that can be made easily. It will take more than ten days at least. They want to..."
"Yeah, I got it."
His brows gradually widened, Li Yuanjia thought for a moment, and nodded slowly: "If you want, let someone build one for them. Anyway, I will explain everything clearly to them, especially when they go to bed at night... Huo Xiao
Some, drink more water, eat more...ahem, forget it, just say the things I said before a few more times!"
Thinking of the vegetable greenhouse that he had not yet built, Li Yuanjia was very upset, so he naturally swallowed it back if he wanted to eat more fruits and vegetables.
A fire bed or something like that is up to them.
As a doctor, it is natural for Li Yuanjia to be cautious about the heated kang. This principle is almost the same as the future heating in the north. If you are used to it, there is nothing wrong with it, but if you are not used to it... just ask anyone who has spent the winter in the north for the first time.
Do those southerners have cracked lips? Do they have sore throats? Are they more likely to catch a cold?
Modern people in the 21st century must have much stronger physiques than those in ancient times.
So what Li Yuanjia is afraid of is that once these people have a fire kang, they will definitely be greedy for the temperature on the kang in winter...especially in the cold winter months, and there may be problems of one kind or another.
but……
Just like it said just now, if you have to build it, just build it!
Although I was a little worried, they were after all a group of women from the powerful families of the dynasty, and the powerful people of the Tang Dynasty basically had a common feature, that is, they were from a good family background, and there were almost no poor people.
In other words, everyone should know something more or less.
So after nodding, Li Yuanjia specifically explained: "But that's all for others. Please explain to Changle and Yuzhang a few more times... I heard that both of them are a bit weak, so don't be careless!"
"Yes, Your Majesty, don't worry."
After biting her lower lip, Fang Fengzhu smiled and nodded.
She also understood what Li Yuanjia meant. After all, even if something happened to others because of the fire bed, the status of King Han could still withstand it, but if something went wrong with Yuzhang and Changle...
While nodding, Fang Fengzhu secretly kept this matter in mind.
Seeing her thoughtful look, Li Yuanjia smiled slightly and said, "By the way, how are you today? Is the club still deserted?"
"Ah? How is that possible?!"
Upon hearing this, Fang Fengzhu immediately became unhappy and glared: "Even Princess Changle is here, how can the club be deserted? Let me tell you, there were fourteen people there at nine in the morning alone... And
After lunch, three or four more went there, and we set up three mahjong tables alone!"
"...playing mahjong again?"
Thinking of what Li Shimin said when he summoned him, Li Yuanjia immediately got a headache.
This thing is so powerful!
The women in the club have quickly proven this. It is conceivable that this thing will definitely spread throughout Chang'an faster than playing cards - playing cards also use paper, especially the requirements for paper.
It is relatively high and the cost is relatively expensive, but for mahjong, you can use ivory carvings, but you can also play with any wood!
Li Yuanjia couldn't help but shudder when he thought about the realization of universal mahjong in the 13th year of Zhenguan in the Tang Dynasty.
Seeing his headache, Fang Fengzhu was a little worried and asked cautiously: "Your Majesty, are we... okay with this?"
"Haha, what's the problem? It's okay."
Waving his hand, Li Yuanjia smiled and shook his head.
As it was, he had nothing to regret. Besides, if mahjong could help promote Arabic numerals, even if he got scolded by the emperor a few more times, it wouldn't seem like a big deal?
After listening to his words, Fang Fengzhu was very happy.
She didn't think too much about it, she just felt that because of the mahjong, the heated kang, the previous sauna, the big landlords and so on, the club is now really prosperous, with people coming every day... although sometimes there are very few people.
, that is, there are only three or two kittens, but someone will come after all, right?
Moreover, everyone came not only to play, but also to study mathematics seriously.
After all, starting from next year, if you don’t know a little bit, you won’t be qualified to join the club. And everyone’s willingness to learn means that they recognize the club very much and will definitely join next year!
For Fang Fengzhu, nothing makes people happier than this.
She was happy here, and Li Yuanjia was also happy, and said with a smile: "Since the club is so lively, then I don't have to worry about it anymore, right? Haha, just in time, I also have something to be busy with next, I'm afraid