<h4>Chapter 381: The Last Number Theory Lecture Before Christmas</h4>


    <strong>Trantor: </strong>Henyee Trantions <strong>Editor: </strong>Henyee Trantions


    After the US$10 million research fund was received, no one else had any doubts about the project or Lu Zhou’s mathematical abilities.


    Even the project meetings were quieter.


    However, it wasn’t quite because of the sudden US$10 million; it was because they didn’t have anything to discuss.


    The entire engineering design had been clearly outlined; all of theplex physics and engineering problems were already solved.


    Right now, the most important problem was implementation.


    The theoretical work wasplete. Suddenly, Lu Zhou realized that in these two most crucial and intense weeks, he had somehow rxed. There was nothing else for him to do, at least not before the equipment arrived.


    However, the engineers had no time to rx.


    In order to prevent the elerator maic field from interfering with the maic field of the sma, they had to drill a hole in theboratory wall and ce the atomic gun further away from the orbit path...


    ...


    Princeton Institute for Advanced Study.


    Hardy and Jerick dug out a two-meter tall Christmas tree and ced it next to the decoration boxes in the office.


    Although Lu Zhou gave them a Christmas holiday, no one wanted to take a vacation.


    Everyone agreed to Hardy’s proposal of decorating the office for Christmas.


    Hardy wiped the sweat off his forehead and stretched his back. He suddenly noticed Lu Zhou, who rarely came to the office, was in the office. Therefore, he greeted him.


    “Professor, will you spend Christmas with us?”


    Lu Zhou was writing at his desk, and he stopped writing and said, “I should.”


    Hardy was delighted, and he immediately asked, “Then... professor, do we get Christmas presents?”


    Lu Zhou smiled and said, “Of course, I’ll prepare a special Christmas gift for all of you.”


    The office was suddenly intrigued.


    Lu Zhou would prepare a Christmas gift for them?


    Although they didn’t know what the gift was, everyone was obviously looking forward to it.


    Of course, some people also looked worried.


    Jerick turned to Hardy and whispered, “The gift isn’t a math problem, right?”


    Hardy said, “Probably... not.”


    However, this seemed like something Professor Lu Zhou would do.


    Hardy wasn’t so excited anymore...


    Vera stopped writing and looked at Lu Zhou as she asked, “Do I get one as well?”


    Lu Zhou smiled and said, “Of course.”


    Lu Zhou would never cheap out on his students.


    He even prepared a gift for the troublemaker Hardy.


    Vera was blushing slightly as she said, “... I also prepared a gift for you.”


    Hardy started to whistle but was stopped by Qin Yue.


    Lu Zhou looked at them and asked, “... Is there a problem?”


    Qin Yue covered Hardy’s mouth and said, “Nothing!”


    <i>Emm...</i>


    Lu Zhou looked at Qin Yue suspiciously and felt like this normally honest guy was hiding something from him.


    But that didn’t matter; Christmas was in two weeks anyway.


    All of the mysteries would be revealed.


    ...


    On thest lecture before Christmas, Lu Zhou brought his textbook to the lecture hall.


    It was almost the holidays. Therefore, the ssroom was full of energy.


    Just like the Chinese students, it seemed that American students felt the same way about holidays as well.


    Lu Zhou walked into the ssroom and when he saw the surprised looks on his students’ faces, he felt a little embarrassed.


    Lu Zhou was very busy this semester. After he returned from Columbia University, he had to fly to Germany.


    Therefore, the students that chose this course because of him barely got to see him.


    Since this was thest lecture, Lu Zhou felt like he should perform his duties as a professor.


    He had some free time anyway.


    “... Today’s lecture is about Mersenne primes, I will mainly talk about the distribution of Mersenne primes and the derivation of the Lu Zhou theorem. This isn’t the main course material, so you can just rx and listen. I’m guessing your minds are on Santa us right now.”


    The students chuckled, and Lu Zhou wrote down the title of the lecture on the whiteboard. He continued to talk with his students in a rxing manner.


    Most of the Chinese textbooks reced Zhou’s conjecture with Zhou’s theorem. However, after Lu Zhou came to Princeton, he found several American textbooks that used “Lu-Zhou theorem”, or “Zhou-Lu theorem”.


    Because these students had already studied the lecture material beforehand, and because Lu Zhou was talking about his own research, Lu Zhou spoke very quickly. It took him less than twenty minutes to finish the lecture content.


    Lu Zhou looked at the time on his watch and saw that there was a lot of time left. Therefore, he looked at his students and said, “There’s still a little time left, feel free to ask me any questions.”


    A girl with maroon hair immediately raised her hand.


    Lu Zhou nodded at her, indicating that she could speak.


    “Professor, are you researching the Navier–Stokes equations?”


    Lu Zhou smiled at this unexpected question.


    “Why do you ask this?”


    “A lot of people are curious,” the girl blinked and said, “and we’re also curious.”


    Lu Zhou looked around the ssroom.


    “Are you guys curious?”


    A third of the students in the ssroom nodded.


    Lu Zhou asked again, “Really?”


    Perhaps it was because of Lu Zhou’s mysterious smile because everyone in the ssroom nodded this time.


    “Okay then,” Lu Zhou said as he wiped the whiteboard and wrote down a new title. He then said, “For the second half of the ss, I will talk about my personal understanding of the three dimensional ipressible Navier-Stokes equation.”


    Revisiting fundamental concepts was a good way of finding obvious problems.


    Lu Zhou was reminiscing about his research ideas, especially those abstract concepts that were difficult to express in words.


    Lu Zhou lectured his heart out.


    However, the students didn’t have such a good time.


    Princeton undergraduate students were talented, and most of them hadpleted all of the undergraduate content while they were in their second year. However, it was still difficult for them to understand the concepts on the whiteboard.


    Even students that had a deep understanding of partial differential equations had trouble understanding them.


    For those that hadn’t learned about partial differential equation yet, it was as if Lu Zhou was speaking in a differentnguage.


    These students were geniuses that often went hand to hand with professors.


    This really humbled them!


    “... ording to the above conclusion, we can calcte the global existence of the smooth solution of the three-dimensional ipressible Navier-Stokes equation in a finite case.


    “As for extending this conclusion to a more general case, more research is needed.


    “I hope that you can think about this problem in your spare time. It isn’t difficult, but it is very interesting.”


    Lu Zhou picked up a marker and wrote on the whiteboard.


    [<B(μ,v),w〉= -1/2∫R3{((u·▽)v)w + (((v·▽)u)·w}dx


    [B(μ,v) = -1/2P{(μ·▽)μ+(v·▽)μ}


    [...]


    Strictly speaking, this wasn’t a practice question; this was a partial differential equation problem that Lu Zhou ran into when he was studying Navier–Stokes equations.


    He obviously didn’t expect the undergraduate students to give an answer. Instead, he wanted to listen to the students’ thought process for inspiration.


    Lu Zhou wrote and exined at the same time.


    “Where P is the Leray projection without the divergence vector L... We now asking searching for the equation Pμi with a square-integrable solution.”


    [... Pμi=?]


    Lu Zhou finished writing thest symbol and ced the marker on the lecture stand. He then looked at the students as he spoke in a joking tone.


    “If anyone one of you can solve this problem, I will rmend them to Professor Fefferman for early graduation, or you can study a master’s or even a PhD under me.”


    Professor Fefferman was not only a researcher at the Princeton Institute for Advanced Study, but he was also the head of the mathematics department at Princeton University.


    Although Lu Zhou spoke as if he was joking, the students didn’t take it as a joke.


    Professor Lu definitely had the ability to let them graduate early.


    Studying a master’s degree under the legendary Professor Lu was an attractive option.


    The lecture hall went dead silent; everyone was thinking.


    However...


    This “question” obviously wasn’t easy to solve.


    Lu Zhou looked at the students and wrote down his email on the whiteboard. Suddenly, in the back corner of the lecture hall, someone raised their hand.


    “... Can I use the whiteboard?”


    Lu Zhou looked at the raised hand and was surprised.


    He wasn’t surprised that someone was attempting to solve the question.


    He was surprised at who this person was.


    The person sitting in the back row of the lecture hall was none other than Professor Fefferman.