Lin Zhaoxi felt that she was also rather strange. Before seeing the "punishment", she was anxious and complicated.
She wanted to know about Lao Lin's past, but she didn't want to inquire too much about her father's past.
But now that she was instructed by Lao Lin and saw Lao Lin pass by with her own eyes, she suddenly calmed down. With a little anger, but more calm.
First of all, she believes that Lao Lin will never plagiarize academically.
Secondly, this is what Lao Lin asked her to find. Her father is so calm, so she really has nothing to feel uncomfortable about it.
The only problem is. What exactly caused Lao Lin's "academic plagiarism" and "expulsion". Is this matter related to the isograph paper published by Professor Feng
As for Lao Lin’s phone call, besides calling the secretariat, is there such a possibility that he really called Professor Feng Deming, who was the director of the Institute of Mathematics at the time.
Lin Zhaoxi took a pen to copy down the key information, closed the yearbook that Lao Lin personally instructed her to find, and put the book back on the shelf.
Then she got up and turned around twice, sorted out her thoughts, and finally walked towards the door.
When walking out of the file room, Lu Zhihao grabbed her: "What's the matter, what happened?"
"You used this sentence pattern a little too much today."
"It's not that you are too weird!"
"I'm normal." Lin Zhaoxi said absent-mindedly. While thinking about it, she walked a few steps upstairs, and then suddenly thought of something, and turned to ask Lu Zhihao, "Is your school's computer room upstairs?"
"No, it's on the first floor."
"Oh." Lin Zhaoxi said, turned around and walked down.
"What are you going to check in the computer room again?" Lu Zhihao quickly walked a few steps to follow.
"you guess?"
"Don't do this." Lu Zhihao began to speak earnestly, "I know you feel uncomfortable, you don't need to tell me, but don't hold back."
Lin Zhaoxi: "?"
"Your father, no..."
"Oh, did you see my WeChat?"
"I accidentally... accidentally saw it, I'm sorry."
"Well, my dad graduated from Yongchuan University, and then he was expelled for academic plagiarism and graduate school." Lin Zhaoxi paused, "This is the material I just found."
"I believe your father will not be this kind of person!"
"Why do you have more confidence than me?"
"Because your father taught you very well, and I have met him, he is really smart and wise... although he has a bit of a poisonous tongue." The last few words were very whispered.
Lin Zhaoxi smiled, and wanted to tell Lu Zhihao that you did not misunderstand Lao Lin, nor did Lao Lin teach you wrong.
—
Lin Zhaoxi followed Lu Zhihao to the computer room of Yongchuan University, and Lu Zhihao opened a computer for her with his campus card.
The screen lit up, and Lin Zhaoxi opened the library of academic papers, the blue and white interface she was very familiar with back then.
She had used the archive countless times, sometimes even staring at it all day long, but never thought of looking up Lao Lin's name.
She stabilized her breath, held the mouse, clicked on the search label "Author", and then entered the three words "Lin Zhaosheng".
The page jumps, and the cursor turns around.
Abstracts of paper titles cascade down.
Agricultural economy, power industry, biology, physics, chemistry...
After clicking off all the irrelevant subjects of the author of the paper with the same name and surname, only the subject of "mathematics" remains.
From 1988 to 1993, only one Lin Zhaosheng published 7 papers related to mathematics. The publishing units are all Institute of Applied Mathematics, National Yongchuan University, and several books can be identified as Lao Lin himself.
From graph theory in discrete mathematics to optimization problems, from the exact graph isomorphism problem to its polynomial time algorithm, finally, Lin Zhaoxi saw a review of the p/np problem written by Lao Lin.
She looked at the papers that had been searched out, and was silent for a while.
There are no papers in which Lao Lin is accused of academic plagiarism, but from the research context of the existing papers, it can be seen that Lao Lin maintains a long-term interest in issues related to graph isomorphism.
And because of the long history, she doesn't know how to measure the academic value of Lao Lin's papers, but "citations" is obviously an important criterion.
"The citation count of this paper is a bit scary. It's really a pity for Uncle Lin."
Lu Zhihao's voice sounded, and the address had changed from "your father" to "Uncle Lin".
Lin Zhaoxi couldn't respond, in fact, "It's a pity" and "It's a pity", she has always had such thoughts since she was sensible.
Now seeing Lao Lin's true academic ability suddenly, this feeling is more real and intense.
It was even so strong that countless images appeared in her mind. Lao Lin took her to sit at the table and walked on the road holding her hand. Lao Lin told her how wonderful mathematics is a subject in a tone full of reverie.
His love is so sincere and pure, will he really be forced to give up mathematics because of her appearance or the so-called academic plagiarism
Would a person like Lao Lin give up
Once, when she showed Lao Lin the test questions of the modeling competition screened by Pei Zhi on the blackboard, Lao Lin seemed to be very familiar with the research fields of Professor Zeng and Pei Zhi.
Later, he became familiar with p/np problems.
Now, the paper that Lao Lin was accused of academic plagiarism and the paper published by Professor Feng in arvix; the reasons why Professor Zeng tried his best to oppose this paper; and the "academic circle" that she had no contact with...
All kinds of clues made Lin Zhaoxi have a kind of deep belief-Old Lin may have given up mathematics for some reason, but maybe he never gave up
She sorted out her thoughts again, first downloaded the 7 papers, then opened arvix, and found Professor Feng Deming's paper on graph isomorphism.
The thesis was written in English, and she carefully read it from beginning to end. There are a lot of professional vocabulary she doesn't know and the proof process that she can't understand at all, but she looked up a few words and read the review several times, and she probably understands that the problem of graph isomorphism in this paper is an npc problem.
It was lunch time, Lin Zhaoxi was immersed in searching for problems, and when she looked up again, only she and Lu Zhihao were left in the computer room.
"What's the matter, you have to hurry up, the graduation ceremony is still an hour away, why don't you check it out first, let's go to your school first, Pei Zhi is waiting."
Lu Zhihao babbled a lot, with an anxious expression on his face. Lin Zhaoxi pressed the Enter key and said to him, "You go first."
"Ah?" The boy was stunned for a moment: "Isn't it your graduation ceremony?"
"That's right." Lin Zhaoxi said, and began to search for more connections between graph isomorphism and the p/np problem.
There are so many related academic papers that she can't start for a while.
"What's right!?" Lu Zhihao said, "Hurry up, these things can be checked at any time, so don't delay the graduation ceremony."
"It's okay." Lin Zhaoxi squinted her eyes, unconsciously tapped the mouse a few times, thinking about where the key to the problem was.
Just then, she saw an academic news item.
- A quasi-polynomial-level algorithm appeared for the graph isomorphism problem, and a major breakthrough was made in the p/np problem, which is the most important achievement in computer theory in the past 10 years.
Lin Zhaoxi touched the mobile phone on the computer desk, even the screen was already lit.
She looked at Pei Zhi's name on the WeChat chat interface. Besides Lao Lin, there was of course another person in this world who could answer his questions immediately.
However, she pursed her lips, and finally turned off the screen.
Since all the questions come from Lao Lin, they should be answered by Lao Lin.
She packed all the content and sent it to her mailbox, then closed the browser and shut down the phone.
"Go to our school alone, I have something to do." She patted Lu Zhihao on the shoulder and said.
"Where are you going?" Lu Zhihao shivered.
"Go and have a meal with my dad." Lin Zhaoxi interrupted directly and sent Lao Lin a WeChat message—"At noon today, am I lucky enough to invite you to have lunch and ask some academic questions?"
Lu Zhihao: "Then shall we go see Pei Zhi off together?"
Lin Zhaoxi paused, thought for a while and said, "It's just lunch, how could it take so long."
—
There is a pastry shop next to the municipal hospital, and there is always a crowd of people at noon, and it takes a lot of effort to grab two window seats.
When Lao Lin arrived, the noodles and side dishes had already been served, and there was only one golden and crispy deep-fried pork ribs.
The sycamore tree outside the window casts a green shadow. Lao Lin holds a large cardboard box, puts it on the ground, and sits down.
"Sure enough, I have grown up and know how to honor my old father." He said as he pulled out his chopsticks and picked up the golden big row.
With sharp eyes and quick hands, Lin Zhaoxi inserted it with the tip of her chopsticks and wrestled with Lao Lin.
"Zhang Xiufen, Li An'an, Chen Ziran, Liu Liu, who are they?" She announced four names in one go, observing Lao Lin's reaction.
That was the staff list of the secretariat of the Institute of Applied Mathematics of Yongchuan University in her small notebook, and she chose the one whose name looked like a woman.
"What?"
"It can't be Wang Qiang and Li Zhigao, right?!"
"Who is telling who? My dementia has gotten worse?"
Lao Lin's expression did not seem to be fake.
"Oh, it's okay." Lin Zhaoxi silently crossed out the initial guess in her heart, that her mother should not be among these people, "Then don't eat it!" she said.
"Comrade Lin Chaoxi." Lao Lin's voice was suddenly low and deep.
"Ah?" Lin Zhaoxi's heart skipped a beat.
"You may have forgotten one thing. Even if you don't invite your old father to eat golden steak, I still have the money to buy it myself."
Lin Zhaoxi: "..."
As Lao Lin spoke, he raised his hand, motioning for the waiter to come over.
Lin Zhaoxi let go of his chopsticks, and while old Lin was flattered to pick up the big row, he asked again: "Proving that graph isomorphism belongs to the npc problem, what is the important role in solving the p/np problem?"
Lao Lin was stunned for a rare moment, but returned to normal after a second: "Hey, your thoughts are very delicate recently."
"How did you see that?"
"The ability to analyze problems has three successes in being a father." Lao Lin only ate two big steaks, and his mouth was full of oil. The matter of being fired is associated with the p/np problem?"
"Because graph isomorphism is relevant to this problem..."
"Student Lin Zhaoxi." Lao Lin chewed on the big row and shook his chopsticks, "The graduation thesis that my father was suspected of plagiarism is called "Research on the Theory and Method of Graph Isomorphism Verification". I can't find it, how did you connect it with p/np, which is a thousand miles away, is there a lack of conditions?"
"..." Lin Zhaoxi was speechless, she coughed lightly, "Then I will begin to explain."
"please."
"After the modeling competition, I went to the office of the school's mathematics department. I saw Professor Zeng and another teacher discussing the problem very seriously. I heard some conversations that proved that there was a problem with the framework. They then asked me to copy a document , Pei Zhi directly intercepted it, did not let me see the above content, and reminded me of the problem of the 'academic circle'."
"Soudi Si Nei." Lao Lin nodded, "It's still missing."
"Later I heard that our university had a grievance with the Department of Mathematics of Yongchuan University. Professor Zeng recently objected to Professor Feng's proof paper that graph isomorphism is an npc problem, so I pinched these issues together."
After Lin Zhaoxi finished speaking, she sat upright: "Mr. Lin, I have finished answering. Please answer next."
"That's it." Lao Lin smacked his lips. "It's actually very simple. If the exact graph isomorphism problem is proved to be an npc problem, and someone discovers its polynomial time algorithm, then p=np."
Lao Lin was gnawing on the ribs, and said in his usual understatement tone. There was a lot of people around them, and the diners in the noodle shop were still yelling "check out", but Lin Zhaoxi felt that the surroundings were suddenly quiet.
"This means that the solution to that problem also means that human civilization will experience a new, unprecedented, explosive development." Lao Lin said slowly.
Lin Zhaoxi could smell the aroma of hot food from the noodle shop. Everything was as usual, but she couldn't help but feel deeply shocked.
She barely put her chopsticks on the bowl, heard the very slight sound of the porcelain being hit, and her own voice: "Is this why you study the problem of graph isomorphism?"
"Professor Zeng, Professor Feng, or Pei Zhi are never the only ones who are interested in p/np issues and trying to climb that peak." Lin Zhaoxi looked at her father and suddenly felt that she was stupid enough, "These people In the middle, you have always been included, right?"
Lao Lin laughed: "Ah, you finally found out."