"Classmate, excuse me, what triangle did you just talk about?"
Hearing these words, the two girls, who were originally a little surprised by the book falling, were stunned for a moment, then raised their heads and looked at Xu Yun.
The tall girl looked at him strangely and said:
"It's Yang Hui's triangle. What's wrong, classmate?"
Another girl named Yueyue was more careful. Her eyes stayed on the card that Xu Yun was holding and turning around for a while - the colors of the graduate card and the undergraduate card were different, although it was not clear in front of her.
This boy is a master's or doctoral student, but in theory, alumni with this degree should not be unaware of Yang Hui's triangle.
So subconsciously, the girl felt that the boy in front of her was probably looking for a reason to strike up a conversation.
This situation is quite common in libraries. Some shy people will pass small notes or use answering questions as an excuse to get closer, while others will take the initiative to strike up a conversation on WeChat.
There are also some fierce people with good grades who are awesome. Most of these people are graduate students. They will secretly write down each other's reading books, determine the target grade, and then apply to be a teaching assistant or something like that.
Xu Yun knew such an outstanding person. In the first year of his Ph.D., he published two papers in the second area, but ended up working as a teaching assistant in his freshman year in order to pursue a junior high school student.
However, it was very tragic that on his first day as a teaching assistant, as soon as that talented man stepped into the classroom, he found his school girl looking at him with a bright smile - note, sitting on his boyfriend's lap.
What a sad story.....
However, because HKUST has always been rigorous in academic studies, neither boys nor girls have done anything radical. It can be regarded as a normal adolescent impulse.
Unless you are really being harassed too much, you will suggest that the teaching assistant or counselor intervene.
Therefore, the girl named Yueyue just gently tugged on her companion's clothes, indicating not to communicate too much. Science students who can use Yang Hui's triangle as an excuse, there is probably something wrong.
But Xu Yun didn't care about this. His mind was completely attracted by what the other party said:
"You mean...it's also called Yang Hui Triangle internationally?"
"yes."
"What about Pascal?"
Hearing the word Pascal, the tall girl couldn't help but frown slightly - it's impossible for someone who can say the word Pascal not to know Yang Hui's triangle, right?
However, out of basic respect for the alumni, she patiently explained:
"Pascal's triangle is Yang Hui's triangle, but it was announced much later than Yang Hui's triangle, so now the name Yang Hui's triangle is commonly used internationally."
The girl's voice is very soft, her eyebrows are thin and long, and they move when she speaks, like willow leaves swaying in the wind in summer.
But Xu Yun's attention was only focused on what she said from beginning to end, and his eyes widened the more he listened.
After a few seconds, he came back to his senses and hurriedly said thank you to the two girls.
Then he turned around and left.
The two girls looked at Xu Yun running faster than the Western reporters and looked at each other inexplicably:
"?"
After a while, the short girl said with a strange look:
"Ning Ning, it is said that HKUST has many weird people since ancient times. Can we see them today?"
The tall girl shrugged and took her companion's hand:
"Okay, okay, let's find books quickly, the library will be closed if it's too late."
Two flowers bloom, one on each side.
While the two girls continued to look for the books they needed, Xu Yun quickly came to a quiet desk, took out his mobile phone, and quickly typed in the four words "Yang Hui Triangle".
Soon, the webpage displayed the encyclopedia entry:
"Yang Hui's triangle is a geometric arrangement of binomial coefficients in a triangle. It appeared in the book "Detailed Explanation of Nine Chapters Algorithm" written by Yang Hui, a mathematician in the Southern Song Dynasty of China in 1261. It was later introduced to Europe by silk merchants in the mid-17th century.
, and was accidentally discovered and studied by Newton in the Cambridge History Museum in 1665, and a number of mathematical results were derived from it."
"Pascal (1623----1662) also discovered this law in 1654, but he completely summarized and published the law in 1666. In his only autobiography, Newton clearly mentioned the time when Yang Hui's triangle appeared
It was earlier than Pascal's triangle, and after he became the president of the Royal Society of Great Britain, he gave Yang Hui's triangle its official and unique name."
"At the International Mathematics Congress in Geneva held in 1992, this geometric arrangement was officially named Yang Hui's Triangle. This is also the only internationally recognized high-order theorem in China that belongs to a local name."
"Up to now, only a few mathematicians from the ancient school in Gaul have always insisted that it is Pascal's triangle. Yang Hui's triangle is used as the official name in international conferences and paper reports."
Xu Yun then searched for the keywords "Yang Hui Triangle#Silk Merchant" and found that there was no detailed mention of this person, and they only used the four words silk merchant to sell goods.
Looking at the search results displayed on the phone in front of him, Xu Yun's shoulders relaxed suddenly and he exhaled a complicated breath.
According to the results shown in the search results, the emergence of Yang Hui's triangle did not have much impact on the inherent theorems or results. It only replaced the original role of Pascal's triangle in the history of European mathematics.
Just like changing 1+2=3 to 1+two=3, it is a simple substitution and will not affect the result.
In addition, traces of Xu Yun's existence were also erased and replaced by a mysterious silk merchant from the East. The discovery location of the Yang Hui Triangle was also changed from Woolsthorpe to the University of Cambridge's History Museum.
Li Feiyu was nowhere to be seen, Han Li was not heard from, and no one mentioned Fengling Yueying Sect.
Everything is so natural, and there is no deviation in history, but the name of this theorem was changed to Yang Hui's Triangle.
A recognized Chinese name that does not need to be shared with others.
It is clear.
Compared with the pair of sneakers in the previous portrait of Newton, Yang Hui's triangle is the real bonus Easter egg!
Originally, Xu Yun's idea was just to hope that the light of wisdom of the Chinese sages would no longer be covered in dust in the timeline of 1665 copies, but who would have thought that his actions would actually affect the present world?
Even though no one knew about Xu Yun's 'contributions', he didn't feel any pity at all.
This should have been the honor that our ancestors deserved. He just did a small job.
Xu Yun sat quietly like this for a long time, and as he thought about it, his eyes gradually became firmer.
He didn't know if he would still have the chance to change the past, and he didn't know if he would still be rewarded with Easter eggs by chance, but one thing he knew very well:
That's now his chance to push the gears of the future.
Although the mission system seems a bit over-the-top, there is no doubt about its capabilities.
Traveling through time and space and changing history is no longer something that so-called cutting-edge technology can do.
The rewards of a so-called novice mission are so tempting, let alone formal missions or difficult missions that may arise.
certainly.
Realizing the rewards for completing the mission requires Xu Yun's own efforts. Without sufficient knowledge reserves, no matter how many and good rewards are, they are like two-dimensional paper figures, visible and intangible.
Xu Yun then took a deep breath, calmed down, and stood up again.
Although the prospects of the mysterious halo are very promising, his top priority right now is not to go to YY's unrealistic future, but to do his own thing well, that is...
Deduced the receptor binding formula of sodium ion channel.