"At the end of the day, it's only math with me." Xiao Ran sighed while brushing the questions.

Sure enough, women only affect the speed at which I learn.

Made!

From this day on, quit drinking!

After a few days of high-intensity brushing, a thick five-year college entrance examination three-year simulation was finally brushed by him, and at the same time, the book of advanced algebra was also read in the time, and now he feels that he has no problem taking the final exam of the advanced mathematics class of the freshman mathematics department.

As for the grades.

Not to mention that a score of 95 or more is a small meaning, this seems a little too crazy, and it is a medium meaning.

It's time to return the book, Xiao Ran decided to go to the Modu Library to return the borrowed book of Advanced Algebra, and by the way, borrow a few more books about random matrices to read.

......

Modu Library.

Since the holiday, this is the first time Xiao Ran has gone out, and he usually orders takeout for dinner, and then he studies, and his life is extremely hard.

Sometimes, even he feels a little unbelievable that he can endure this loneliness and calm down to study.

But I have to say that this feeling of watching myself progress little by little and being fulfilled is indeed a bit addictive.

Especially when the mathematical edifice, which was originally like a fog, dissipated little by little in front of him, revealing its mysterious and gorgeous veil, the sense of accomplishment was really unprecedented.

After entering the library, I went to the service desk to return the books, and then came to the mathematics area, and after looking around, I took three copies of "Random Matrix Theory - Mehta", "Probability", and "Matrix Analysis" to the corner against the wall.

Today's library is much more deserted than in the past, Xiao Ran estimates that because of the cold weather and the fact that it has been on winter vacation, there are many fewer people who are willing to come to the library to read and study.

took out the notebook and plugged it in, still logging in to station B to find the tutorial of the random matrix, Xiao Ran put on the headphones, opened the "Random Matrix Theory", listened to the teacher's explanation in the headphones, and nibbled on the new book without distraction.

The study time always flies, and soon it is half past eight in the evening.

"Classmate, it's half past eight, and we're closing." It wasn't until the librarian came over to remind him that Xiao Ran came back to his senses from the ocean of learning.

"I'm sorry, I've lost track of time." Xiao Ran got up apologetically and cleaned up the books and notebooks on the table.

"Now that this is the point in time, can these books still be registered and borrowed?" He asked embarrassedly as he cleaned up.

"It stands to reason that the time has passed...... Forget it, give me the book, and I'll help you register. "The librarian is a bespectacled man with gray hair.

Perhaps it was Xiao Ran's focused learning attitude that moved him, and he didn't bother him, and immediately said with a smile: "I have worked here for so many years, and it is rare to see a classmate as focused on learning as you. ”

"Thank you so much, uncle." Xiao Ran said sincerely, and handed the three books "Random Matrix Theory - Mehta", "Probability", and "Matrix Analysis" to the librarian.

"Yo, random matrix, I don't see any college students studying this anymore." Uncle Librarian took the three books and glanced at Xiao Ran in surprise.

"You're going to use this topic for your dissertation?" It's not easy to start, and you don't look like a graduate student, but if you're a college student, the topic of this graduation thesis is a bit difficult for you. ”

"If you want to understand random matrices, you need to at least have a good foundation of probability, matrix theory in linear algebra, as well as classical multivariate statistical analysis theory, as well as some complex integral calculations, such as Cauchy integral formula, retention theorem, etc."

"Young man, if you're going to write a graduation thesis, I think it's better for you to change the subject."

The library uncle talked eloquently, and he was even more comfortable with various mathematical formulas and theorems, and he couldn't help but scratch his head when he heard it.

Damn, the level of librarians is so high now?

"Uncle, you also know random matrices?" Xiao Ran asked tentatively.

"Hey, I understand a little, I studied it blindly when I was young." The uncle waved his hand, looking modest.

Xiao Ran was a little unconvinced, and immediately asked the uncle some of the problems he encountered when learning random matrices today.

Unexpectedly, the uncle was really unambiguous, and explained to Xiao Ran in simple terms.

This explanation is half an hour.

It wasn't until the uncle was a little dry that he said with some unfinished words: "Random matrices are not difficult to say, simple is not simple, if you are really interested in this aspect, if you want to systematically learn the method theory, you can take a look at the "Spectral Analysis of Large Dimensional Random Matrices" written when I was young, you can combine the theorem in the book with the corresponding paper of the theorem, maybe it will help you. ”

Xiao Ran: ......

No, wait a minute??!!

I'm interested in looking at the spectral analysis of large-dimensional random matrices that you wrote when you were younger?

Did I hear something terrible......

Xiao Ran looked messy.

What kind of immortal was this uncle when he was young?

"Uncle, what did you do when you were young?" He couldn't help but ask.

"Hey, as soon as I was teaching at the university, I had nothing to do when I retired, so I thought about running to the library to see the door." The uncle still has a happy smile on his face.

"Can you tell me which university you are in?"

"Aurora, but it seems that I have taught in Tongji for a few years, hehe, it's not worth mentioning, it's not worth mentioning!"

It's not worth mentioning!

Xiao Ran was silent for a moment, and then sighed with some embarrassment: "It is said that the profession of librarian is a hidden dragon and a crouching tiger, and he really doesn't deceive me!" ”

This uncle, there is really something!

Xiao Ran decided that he would come to the library tomorrow, and by the way, he would have a good relationship with the library uncle, and he must let him teach him a few hands, at least about the knowledge of random matrices, and he had to find a way to hollow out the uncle.

With such a great god standing in front of him, if he didn't know how to seize the opportunity, it would be really stupid!

Old man, it's time to explode experience!

In the next few days, Xiao Ran really ran to the library every day, and brought some cigarettes and alcohol to the library uncle, shushing the cold and asking for warmth, as expected, won the favor of the librarian.

Of course, Xiao Ran's focused learning attitude and talent made him love talents.

In short, the uncle can be said to have taught Xiao Ran everything in terms of random matrix, as if he was treated as a closed disciple.

Under the uncle's teaching, Xiao Ran is like a hungry sponge, fully absorbing the uncle's knowledge about random matrices.

Every day, Xiao Ran's state is basically like this.

Knowledge +3!

Knowledge +3!

Knowledge +3!

......

Two weeks later, Xiao Ran happily took out a paper, "Teacher, I recently wrote a paper, can you please guide me." ”

"Yo, got your dissertation done so quickly?" The uncle took the paper with a smile.

"I can say okay, let me give you guidance no problem, but I always hate people to fool me with indiscriminate papers, if your paper doesn't make my eyes shine, don't think about getting my guidance in the future."

As he spoke, he took the paper and glanced at it, "Hmm...... Discussion on the application of random matrices in multiplication – taking the proof of Stirling's formula as an example. ”

Well.....

Well??!!

The uncle's eyes widened suddenly.

It's like seeing a ghost!