The iron should be struck while it is hot, Shen Qi said: "No need Director Long, let's go to the next link." ”

"It's fine. Director Long, the main defense teacher, prepared three questions and listed them as an outline.

In a defense meeting, the most important thing is the question and answer session.

The rules are simple, the teacher asks questions, the students answer, and both sides have a friendly debate based on the topic of the paper.

The answer is correct, the argument is good, take the diploma, and take it to the waves.

I got it wrong, I knelt down, and I'll come back next year, big brother dei.

The Q&A session is different for each school.

In some schools, the teacher first asks three questions at a time, and asks the students to leave the venue to prepare for ten or twenty minutes, sort out their ideas, and then enter the venue to answer.

Director Long's rule is to answer questions at any time.

Ask a question, Shen Qi must answer on the spot, and he is not allowed to leave the scene to find inspiration outside.

"Please Shen Qi, turn to pages 15 to 16, my first question is, please explain in detail the Fisher-Bermeister function, the elaboration in the paper is too simplistic. Director Long threw out the first question.

Fisher and Bermeister are both contemporary mathematicians, active in the sixties and nineties of the 20th century.

Now the two old men who are old have returned to their hometowns and retired to the rivers and lakes.

Regardless of whether people are in the rivers and lakes, the names of the two old men will always be spread in the rivers and lakes.

The Fisher-Bermeister function was used by Shen Qi as a tool in the paper, and the main purpose was to connect the previous and the next.

Shen Qi did not elaborate on the definition and demonstration of the Fisher-Bermeister function in the paper, but directly used the conclusion.

The paper submitted to the defense teacher has been impeccable by Shen Qixiu, at least it seems.

Shen Qi is confident that it is impossible for the three teachers to overturn their own argument logic, and there are no loopholes in the overall situation.

If the defense fails, the only reason is the details.

In the question and answer session, the popular point is to find faults.

The teacher asks questions from the smallest details, and examines the depth and breadth of the student's scholarship, judgment and responsiveness, and flexibility of thinking.

This critical moment must not be false, teachers often deliberately set traps, and timid people are often scared to death by themselves.

Of course, the details are actually the hardest, and the details determine success or failure.

Before entering the venue, Shen Qi didn't know what questions the defense teacher would ask, he made a lot of preparations and thought of various plans.

Please explain the Fisher-Bermeister function in detail?

It's not difficult, it's prepared.

Shen Qi thought for a moment, and then replied: "The function is a first-order semi-smooth, and according to this property, the problem on pages 15 to 16 can be rewritten as a system of non-smooth equations. Director Long, do you need me to explain this non-smooth equation system in detail?"

Director Long waved his hand: "No, just say the main idea." ”

"OK, then I'll go on. Shen Qi continued, "If the Fisher-Bermeister function is extended, I will have to write at least 20 more pages in the paper, which is inevitably a suspicion of making up the word count. This paper is not for new mathematicians, so I can't write a Fisher-Bermeister function in 20 pages. ”

"The introduction of the Fisher-Bermeister function lists the original concept of semi-smooth analysis, and the Clark generalized Jacobian matrix is locally bounded and semi-continuous, so I directly use the conclusion of the Fisher-Bermeister function here, and use Df to define that all x belong to the set of Φ, and finally solve the problem in the second part of the paper. Shen Qi explained this, paused for a few seconds, and observed the expression of the defense teacher.

"That's it. Director Long nodded, why did he ask this basic question, because he was worried that the respondent would plagiarize, or not seek to explain it.

Some students are in a hurry to do this, find a paper to adapt and hand it in.

Shen Qi asked and answered, and immediately answered, and the answer was to the point.

Director Long expressed his gratification, and then asked the second and third questions, which were increasingly difficult.

Shen Qi replied fluently and held the audience.

"That's it. ”

"The explanation is reasonable. ”

Director Long's comments are just like his character, calm, peaceful, and indisputable.

Shen Qi is a little embarrassed, and the old leader, the head of the mathematics department, is too good to talk, right?

After the three questions of the main defense teacher, I have passed?

Got your bachelor's degree in mathematics at Yan University?

"Director Long, let's enter the summary link, huh?" Shen Qi asked tentatively.

"Don't rush. Director Long smiled kindly, looking left and right: "Teacher Ma, Teacher Xiong, do you have any additional questions?"

"I'll start with that. "Mr. Ma is a poker face that does not smile, from the beginning to the present, this is the first thing he said.

"Shen Qi, please turn to page 4, I don't think the algorithm you started with is rigorous. This is Mr. Ma's second sentence, which is murderous.

Shen Qi smiled, but he was a lot more stable in his heart. I can see that Director Long sings with a red face, and Teacher Ma sings with a white face.

That's right, this is the style of my Dashu Academy, how can a defense be so easy to pass.

"Please comment, Mr. Ma. Shen Qi said politely.

"In the subproblem (Pk), Equation 3 should not be the local linearization approximation of the quadratic model of the objective function at the xk point, which is miscalculated and logically wrong!" Mr. Ma solemnly pointed out a mistake in the paper, a place that he thinks is wrong.

"What?" Shen Qi hurriedly flipped through the paper, and Mr. Ma made a big move as soon as he made a move, so ruthless!

What's wrong?

Why is my logic not rigorous?

The opening pages couldn't be wrong, and even the super annoying reviewer agreed with my opening algorithm.

What does it mean to have a logical error in the opening algorithm?

It means that a paper is written in vain, the premise is wrong, and a yarn is discussed later.

There was silence at the defense site.

Shen Qi was in a daze.

The three defense teachers looked at Shen Qi in a daze, waiting for Shen Qi's answer.

Minutes and seconds passed.

Shen Qi continued to be in a daze.

"Shen Qi?" Mr. Ma reminded.

"Oh. Shen Qi raised his head and looked directly into Teacher Ma's eyes.

These eyes are neither big nor small, neither happy nor angry, wise and arrogant fly together, sincerity and deception dance together.

That's right!

Teacher Ma is tricking me!

Logic traps!

The supplementary question raised by Mr. Ma is a paradox in itself, a question that is inconclusive.

Don't fall for Teacher Ma's way, follow his rhythm, and then you will die.

You are obviously a rhythmic old horse, if you are an ordinary person, you are really scared to kneel.

Opposite.

After a short period of panic and fear, Shen Qi quickly returned to normalcy and calmly and confidently returned to his position again.

What is the core of dissertation defense?

It's debate.

The point made by the teacher is not necessarily correct, and in this particular occasion, it is not necessarily correct.

Students should quickly see through the teacher's tricks and make the most reasonable arguments.

The dissertation defense that Shen Qi is experiencing is not only a test of the depth of professional knowledge, but also a comprehensive examination of his judgment, insight, reaction speed, and a little bit of stubbornness and persistence.

It is not easy to be a college student in these years, comprehensive quality is the key, and the survival rate of comprehensive talents is relatively high.

"Mr. Ma, in the subproblem (Pk), there is actually no so-called algorithm logic error, I think so. Shen Qi already had a corresponding plan in his heart, he had rice in his heart, and he was invincible in his mouth: "If it exists, then this existence itself does not exist." ”