Liu Rui's eyes widened and almost bulged out in surprise.
Although the solution was a novel idea, the problem-solving process was clearly written, and the knowledge points involved did not go beyond the outline. Even without Lu Zhou's explanation, he could easily understand it.
And in such a short time...
It was just something he couldn't figure out. How did that guy Lu Zhou figure it out
Well, that's right.
Lu Zhou stretched out his hand, and Liu Rui pushed up his glasses, handed over the exercise booklet in his hand, pointed to the circled question and said, "That's it."
The point is, Lu Zhou's solution is actually simpler than the standard answer! The answer did not take into account the eccentric solution of converting rectangular coordinates into polar coordinates, but directly applied the formula to split the integral twice, which resulted in an extremely large amount of calculation.
Thinking like this, Liu Rui said: "How about you copy down the questions and do it? I'll think about the next question first?"
"I have to work hard. I haven't touched a book for almost half a semester. If I don't work hard, it will be too late." Throwing the bath towel on his shoulders, Lu Zhou stood up from the chair.
"Bingo! That's the right answer." Lu Zhou smiled and nodded, thinking that children can be taught.
However, publishing the proof of Zhou's conjecture in an SCI journal would be a big problem. It's not a question of whether he can pass. It's definitely possible to pass. However, the key is whether he can hold on after passing.
In the end, although Lu Zhou still chose the third task, he did not plan to use Zhou's conjecture to prove it. Instead, he casually wrote a watering paper to pass the task.
"Finally turn it into the integral of the square of cscx! Then substitute it into the original function!" Liu Rui's pupils shrank slightly, and he keenly saw through the core idea of this solution. In the next steps, just follow the flow, just keep going, no Any difficulty.
Pushing open the bedroom door, no more, no less, exactly ten o'clock.
His current understanding of the two courses of advanced mathematics and mathematical analysis is no less than that of a graduate student. Coupled with the level 4 English, the only difference between writing English papers is some professional terms, and these can be solved by looking up the dictionary.
After staying outside for so long, if he doesn't go back, I'm afraid Liu Ruide will lose his mind.
Turning to the back of the exercise book, Liu Rui looked at the answers and was stunned for a moment, muttering to himself.
This is such a phenomenon that a certain good person made a ranking list for several well-known domestic journals. The one at the top of the list, Applied-Mathematics & Computation (AMC), is famous in the field of irrigation.
In the eyes of a true scholar, all mortals are scum, so what if I showed you my notes? Zhou, do you think you can? You can’t even figure it out if I put it in front of you!
Taking Lu Zhou's draft paper and returning to his seat, Liu Rui pushed up his glasses, stared at the topic, frowned slightly, and fell into deep thought.
Liu Rui bit his lip.
And this is one of the solutions he has considered...
Lu Zhou threw his backpack on the table and reached into the drawer to find his bath card.
Liu Rui was holding an exercise book to answer questions. The other two people were not in the dormitory, probably playing cards next door. Shi Shang is a person who usually listens to lectures and doesn’t make any special time to review at the end of the semester. As for Huang Guangming, he is probably the legendary god of learning. He usually doesn't listen to lectures and crams before exams, but his scores are ridiculously high.
After choosing the mission, Lu Zhou patted the grass clippings on his butt, stood up, and walked towards the dormitory humming a song.
Regarding this question, it is true that he cannot solve it, but there is actually a reference answer, and the answer also has a detailed solution. The reason why I asked Lu Zhou this question was not because I was seeking advice out of humility, but because I just wanted to "find out the enemy's situation."
"Points problem? This thing shouldn't be difficult..." He glanced at the question twice, and surprisingly it was a question type he had never seen before. Lu Zhou became interested and was not in a hurry to take a shower. He sat back down with the exercise book. Sitting on the chair, I picked up a pen and started writing and drawing on the scratch paper.
However, Lu Zhou's reaction was beyond Liu Rui's expectation.
Is this kind of person considered a top scholar
Call him confident or swollen.
Seeing that Lu Zhou was about to take a shower, Liu Rui suddenly said, "I can't solve a question here. Can you help me?"
Secondly, I haven’t even started taking the Big Objects course in my freshman year. I’m afraid that all the system will show are high school physics exercises, and who knows what the difficulty level is. Moreover, the physics level is not that attractive to him. The name sounds like it will only be used in the later stages. It is not too late to practice it when needed.
Liu Rui thought for a while, and it seemed that this was the only possibility. Otherwise, he really couldn't imagine that this scumbag who was busy working part-time all day long could actually crush him, a recognized academic leader in the class, in terms of problem-solving speed.
In the end, reason defeated greed, and Lu Zhou gave up this unrealistic idea.
…
"Thank you... lend me the draft paper and I'll take it over to study it."
There is no doubt that he is talking about himself.
Oh, that's strange.
In short, Lu Zhou didn't think it was a big problem.
Suddenly I felt a little doubtful about life.
"Yes, you heard it right." Turning the ballpoint pen in his hand, Lu Zhou explained to the equation on the scratch paper, "A very typical double integral problem. The first step is to convert the rectangular coordinates into polar coordinates and start the calculation. , due to interval symmetry, this part of the formula can be simplified to cotx square..."
"Let's take a look."
"Take it, you're welcome!" Lu Zhou waved his hand generously, stood up, and walked to the bathroom.
Have you done this type of question before
Are there any questions that you can't always solve
At this time, Liu Rui put down the exercise booklet in his hand, glanced in Lu Zhou's direction and asked.
"...No need, it's untied."
Just talking about Shanghai University, in just four years, hundreds of mathematics papers were published on AMC. It is not a big deal for some trolls to post more than 20 papers a year!
Solved, solved? !
In order to ensure the academic quality of papers, those well-established journals often strictly control the number of papers published in a year to less than 100. But this "Big Mac Journal" is very impressive. It publishes more than a thousand papers a year. Coupled with cross-citations and other phenomena, the impact factor is constantly rising! Even due to the large number of pseudo-reviews, a certain editorial board member published more than a hundred articles on it!
How can this be!
If Liu Rui's questions could be difficult for him before, he would definitely not be able to solve them. But for some reason, there was no "impossible" thought in his mind at this moment.
Lu Zhou didn't think so.
It's nothing for a freshman to publish in SCI. Anyway, the phenomenon of spamming in domestic mathematics SCI journals is quite serious. As long as your English skills are good and you are sparring like that, you will probably pass.
The implication is that you don’t know how to write anyway, so I won’t waste your time.
This kid is very strange. Although he is usually very generous, but only in this aspect of learning, he is so narrow-minded that it makes people speechless. A glance at your notes can chase you down two streets, and asking a question can make you roll your eyes a dozen times. This is probably the kind of person I'm talking about. In his eyes, it seems that the world is full of his competitors, and what he is chasing is probably not academic heights, but just the number one position in the eyes of teachers or classmates, or the status of "student master".
Taking ten thousand steps back, even if he had to ask a math question, he would not ask Lu Zhou, a scumbag.
Seeing Lu Zhou calculating with a pen for a while, Liu Rui breathed a sigh of relief, and secretly despised the fact that a scumbag is still a scumbag, no matter how much he pretends to be a scumbag.
In Lu Zhou's knowledge, there seems to be only one person who meets the qualifications of being a top student.
Looking back at the other two tasks, in the first one he didn't have the connections, and he didn't think he had that high emotional intelligence.
The answer is absolutely correct... but that's not the point.
"impossible… "
Damn it, why didn’t I think of this step...
Lu Zhou may not be confident about other SCI journals, but for AMC...
"Elbow, are you working so hard?"