Scholar’s Starry Sea

Looking at Wu Bin’s slightly disappointed expression, Gu Ningshan was also very uncomfortable. The reason why she suddenly mentioned the atomic model was because Wu Bin praised her for being very good, so in order to strengthen Wu The impression of Bin took the initiative to provoke this topic, but it was only half an hour before she didn't expect...

She was led by Wu Bin!

'If you have a Gravity formula, just use it! Why do you have such a big brain hole! Do you know what you call a horny horn? '

But Gu Ningshan can’t shout out, because although the problem of how Gravity arises has not been completely solved, there are indeed people who are studying it, and there have been many results, but she did not go deep. It’s just to learn this piece, so the fact is, she was asked by Wu Bin, which made her very angry!

Song Nanfeng, who was watching the excitement, was about to snicker, but he saw Wu Bin’s gaze shifted towards him. This made him feel overwhelmed. He didn’t want to spend the night with Wu. Bin discusses this horny problem.

So he stood up with the dinner plate and said, "After eating, let’s go. I will take you to the Spectacle Lake at night."

When I heard that he was going to the Lake, Wu Bin immediately lost interest, and said, "Why don't you want tomorrow?"

"Also, are you planning to go back to the hotel now?" Song Nanfeng asked.

"No, I plan to go to the library for a while, I just saw a book that is quite interesting."

Song Nanfeng did not know whether to cry after listening or laugh, although he pays so much attention to Wu Bin, it is because of his madness that he loves to study, but this time he came to University of Science and Technology for a few days, so it’s impossible to spend all his time in the library. He made the decision to come to the University of Science and Technology. After all, he has no advantage over Jingbei!

"I'll go with you." Gu Ningshan finished the last sip of the cold porridge, wiped his mouth, jumped out of the chair and looked at Wu Bin and said.

"Okay." Wu Bin nodded, he doesn't mind having one more library partner.

"Then I'll go together, too." Ding Yuhai stood behind the two after finishing the dinner plate.

Looking at the back of the three of them, Song Nanfeng touched his chin, suddenly eyebrows raised, nodded said: "Then you go together, remember to take care of this little Junior Brother."

"I know~" the two girls said at the same time.

When they came to the library, the three of them sat down quietly, and all opened their favorite books and started to study.

In the middle of the night, Ding Yuhai suddenly asked two other two people in a low voice: "A little hungry, do you want to eat supper?"

Gu Ningshan lifts the head and clicked, I agree, maybe I am a little hungry.

Wu Bin whispered: "Go ahead, I'll look at it for a while."

Gu Ningshan tilted his head and glanced at the cover of Wu Bin's book.

"INTRODUCTIONTOLINEARALGEBRA"

"This book did you also chew?"

Gu Ningshan's tone is a bit surprised. This linear algebra book is Massachusetts It was written by Gilbert Strong of Polytechnic. It is counted as one of the Peak works of linear algebra textbooks. She has also read it. It is indeed very comfortable to read, but the boy in front of him...

" Let’s go and eat supper. I have also read this book. I can talk to you a little bit and I will lend you the book."

When Wu Bin heard it, it seemed that he was "attracting to the opposite sex" with the chair. My butt lost its "magnetism" in an instant, so I closed the book and stood up to face Gu Ningshan nodded.

Leaving the library, Gu Ningshan, who didn’t have to talk cautiously, asked Wu Bin: "How many things have you taught yourself?"

"Not much, most of them are This time I went to the National Team training camp of Peking University. After the professors finished their own courses, they told us a lot of other things. They also recommended many books, including this linear algebra textbook, so I was in the afternoon. I want to read it when I see it."

"I really want to take a look at the Physics competition..." Gu Ningshan murmured and asked, "Oh, yes, you still Didn’t answer me, can you gnaw this book?"

"It’s okay, it’s really well written, enough to explain in simple terms."

"Yes~ Good English Well, this book is quite unfriendly to people who don't have enough vocabulary." Gu Ningshan stood on tiptoe and praised Wu Bin.

"Because a teacher once told me that if you don't learn English well, you won't be able to get in touch with the most cutting-edge knowledge, so I worked very hard when learning English."

Ding Yuhai on the side couldn't help but said: "Aren't you going to discuss what we are going to eat later?"

"Everything will do." Wu Bin and Gu Ningshan said at the same time.

Ding Yuhai sighed and couldn't help holding his forehead.

Wu Bin, who is still discussing linear algebra with Gu Ningshan after walking a long section of the road after leaving the University of Science and Technology, suddenly discovered one thing, that is the University of Science and Technology There are almost no shops around, and it looks sluggish.

"Are there no barbecue stalls nearby?" Wu Bin asked.

"It will be there after a short walk," Ding Yuhai replied.

Wu Bin nodded, looked at Gu Ningshan again and asked: "But is it really okay for you to come out so late?"

"Occasionally, it’s okay to escape for a night~ I live at night Senior Sister's house."

'As expected of college, it's free! '

Although I don't know if this is the correct impression, Wu Bin wrote it down anyway.

As Ding Yuhai said, after a short while, Wu Bin saw a food stall at the corner, but it was not very lively.

"Come, come, three of you sit inside." The Boss who was cooking saw Wu Bin and they stopped in front of his stall and immediately greeted him enthusiastically.

"Is this all right?" Ding Yuhai asked Wu Bin.

"Yes." Wu Bin nodded.

"That's it." Ding Yuhai pointed to an empty table in front of him.

As soon as he sat down, Wu Bin couldn’t wait to spread out the book that Gu Ningshan helped him borrow, and pointed to the question above: Why is the last matrix e^At, e^ What exactly is At equal to? "

"Let me see" Gu Ningshan went to the front of the book and took a look, replied: "e^At, if A is not a diagonal matrix, not every element becomes the power of e Calculated. If you simply follow the definition, it is to expand the e^x power Taylor into an infinite term, then substitute x=At into it, and then look at the situation of each element to define. "

"Expand by Taylor? Then after the expansion, it has nothing to do with the exponent of e, and all becomes a matrix operation containing the variable t. How does this correspond to the answer in the book? "

"Two great geniuses, can't they have a good meal before discussing the questions?" "Ding Yuhai didn't know whether to cry or laugh.

She originally thought that Gu Ningshan was already book-loving enough, but she didn't expect something more ruthless.

"Just finish this topic. "Wu Bin pointed a finger at Ding Yuhai.

"Fine...then you are talking, I will help you order food, is there any restriction? "

"No, thank you. After Wu Bin finished speaking, he continued to look at Gu Ningshan and asked: "For example, the third picture here shows the exponential function of the diagonal matrix = the proof of taking the exponent on the diagonal element..."