Xueba's Sea of ​​Stars

Chapter 156 Can You Eat This?

Seeing Wu Bin's slightly disappointed expression, Gu Ningshan was also very sad. The reason why she suddenly brought up the atomic model was because Wu Bin praised her for being very powerful just now, so in order to strengthen Wu Bin's impression, she took the initiative to provoke this topic, but she didn't expect only half an hour...

She was taken into the ditch by Wu Bin!

'If there is a formula of universal gravitation, you can use it!Why do you have such a big brain!You are called a dead end, do you know that! '

But Gu Ningshan couldn't shout out, because although the problem of how gravitation is generated has not been completely solved, there are indeed people who are researching it and have achieved a lot of results, but she didn't study it in depth, so the fact That is, she was overwhelmed by Wu Bin's questioning, which made her very angry!
Song Nanfeng, who was watching the fun, was about to snicker, but he saw Wu Bin's gaze moved towards him, which made him feel overwhelmed. He didn't want to spend the whole night discussing this trivial issue with Wu Bin.

So he stood up with the dinner plate and said, "Let's go when you're done eating. I'll take you on a night tour of the Lake of Spectacles."

As soon as he heard that he was going to swim in the lake, Wu Bin immediately lost interest and said, "How about tomorrow?"

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

"No, I'm going to go to the library for a while. I just saw an interesting book."

Song Nanfeng couldn't laugh or cry after hearing this. Although he paid so much attention to Wu Bin because of his crazy love of learning and love, he only came to HKUST for a few days this time, and he couldn't let him spend all his time in the library. Making the decision to come to HKUST, after all, has no advantage over Jingbei!

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

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

"Then I'll go with you too." Ding Yuhai also stood behind the two after packing up the dinner plate.

Looking at the backs of the three of them, Song Nanfeng touched his chin, raised his eyebrows suddenly, nodded and said, "Then you guys go together, remember to take good care of this little boy."

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

When they arrived at the library, the three of them sat down quietly, opened their favorite books and started studying.

Until late at night, Ding Yuhai suddenly asked the other two in a low voice: "I'm a little hungry, do you want to eat supper?"

Gu Ningshan raised her head and nodded, agreeing, probably a little hungry.

Wu Bin said in a low voice: "You guys go, I'll watch it later."

After hearing this, Gu Ningshan tilted her head and glanced at the cover of the book in Wu Bin's hand.

《INTRODUCTION TO LINEARALGEBRA》

"You can chew this book too?"

Gu Ningshan's tone was a little surprised. This linear algebra book was written by Gilbert Strong of MIT. It can be regarded as one of the pinnacle works of linear algebra textbooks. She has also read it, and it is indeed very comfortable to read. , but the boy in front of him...

"Let's go have a late-night snack. I've also read this book. I can talk to you about my experience. I'll lend the book to you."

As soon as Wu Bin heard it, his ass, which seemed to be "attracted to the opposite sex" with the chair, instantly lost its "magnetism". He closed the book, stood up and nodded towards Gu Ningshan.

After leaving the library, Gu Ningshan, who no longer needed to speak cautiously, asked Wu Bin, "How much have you taught yourself?"

"I didn't learn much by myself. Most of them were learned at the national team training camp at Peking University. Those professors taught us a lot of other things after teaching their own courses. They also recommended a lot of books, including Including this textbook on linear algebra, so I wanted to read it when I saw it in the afternoon."

"I really want to take part in the physics competition..." Gu Ningshan muttered, and then asked, "Oh, right, you haven't answered me yet, can you chew this book?"

"It's okay, the writing is really good, it's easy enough to understand."

"Yes~ English is not bad, this book is quite unfriendly to people with insufficient 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 in learning English."

At this time, Ding Yuhai couldn't help but said, "Aren't you going to discuss what we're going to eat later?"

"Anything is fine." Wu Bin and Gu Ningshan said at the same time.

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

Wu Bin, who was still discussing linear algebra with Gu Ningshan after walking a long way after leaving the University of Science and Technology, suddenly discovered that there were almost no shops around the University of Science and Technology, which seemed to be very depressed.

"Aren't there any barbecue stalls nearby?" Wu Bin asked.

"It will come after a short walk." Ding Yuhai replied.

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

"It's okay to run away overnight~ I'll stay at my senior's house at night."

'Worthy of being a university, it really is free! '

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

As Ding Yuhai said, after walking for a long time, Wu Bin saw a food stall around the corner, but it was not very lively.

"Come, come, sit among the three." The boss who was cooking saw Wu Bin and the others stop in front of his stall, and immediately greeted him enthusiastically.

"Is that 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 borrowed for him, pointed to a question on it and asked: Why is the last matrix e^At? What does e^At equal? "

"Let me see." Gu Ningshan looked at the book and replied: "e^At, if A is not a diagonal matrix, it is not calculated by how many powers of e each element becomes. If we simply follow the definition , which is defined by expanding e^x power Taylor into infinite items, substituting x=At into it, and then looking at the situation of each element.”

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

"You two great geniuses, can't you finish your meal before discussing the topic?" Ding Yuhai asked dumbfounded.

She originally thought that Gu Ningshan was already addicted to books, but unexpectedly, a more ruthless one came suddenly.

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

"Okay...then you guys talk and I'll help you order. Are there any taboos?"

"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 elements..."

(End of this chapter)