Shi Ning's gaze fell on the book, and then he leaned down slowly, and landed on Zhi'an's hand, looking at the math problems in the book very seriously.

Since last night, he knew that Lu Zhi'an, Xi Qinghuan, and Qi Bo had begun to teach themselves advanced mathematics, and now when he saw the advanced mathematics problem bank in his hand, Shi Ning was already very calm.

What Director Xu and Yang Qiwei said was no longer within the scope of their attention, Shi Ning even took out a sketchbook and pen from his schoolbag, and said while writing: "The finite coverage theorem, we must pay attention to two points, one is that the covered interval must be a closed interval, and the other is that the interval used to cover the closed interval must be an open interval, and the closed interval or semi-open and semi-closed interval is not established. I'll take a look at ......."

While speaking, he had already started to write in the draft book, and he didn't listen to what Director Xu and Yang Qiwei were saying at all.

Yang Qiwei had been chatting with Director Xu very seriously for a while, and he didn't pay attention to what the two of them were doing, until Yang Qiwei glanced at the two of them, he paused when he had been talking, and smiled at Director Xu with a serious expression: "Director Xu, the two of them have given you the best answer to the question you are worried about." ”

Director Xu looked down and saw that the two students they had been discussing were working on the questions very seriously...... He almost quarreled with his parents, and the two of them still had the heart to do the question?

Listening carefully, Director Xu was so shocked that his fingers trembled.

"According to Dedekin's theorem, there is a η of the only real numbers, so that η is the dividing point between A and B, then ......" Shi Ning wrote as he said in a low voice, his expression focused on what was happening around him, shielding everything around, "...... Let the set of these finite open intervals be H1......"

"I'm ......solving the mistake here," Lu Zhi'an, who was holding the pen in his hand, tapped lightly on the scratch paper with the tip of the pen, leaving a few small black dots, "The minimum value is wrong, and there is no way to calculate it later." ”

"Qinghuan is the ...... to solve the mistake here" Therefore, both of them are wrong, and they insist on it, but there is no result.

Shi Ning nodded and analyzed carefully, "Very correct, the easier it is for the finite coverage theorem, the easier it is to make mistakes, and the mistakes of you and Xi Qinghuan are the most common mistakes." ”

The pen in his hand kept swiping on the scratch paper, and finally turned the page and continued to write, the moment the paper was turned over, the light penetrated the paper, and Director Xu saw that the side of the paper was full.

Finite Coverage Theorem, Dekkin's Theorem...... It's all high math in college, and Shi Ning and Lu Zhi'an have already started to discuss high math!

"Director Xu, we've been staring at them for three minutes, and the two of them have no influence, they haven't noticed us at all, you say, is it a bad thing to fall in love with the two of them early?"

"No, early love is just a spice for them, and it will even push the two to study and compete together. I know the two children very well, they will be strict with themselves, they will help each other, they will solve learning problems together, and they will supervise each other. ”

Yang Qiwei was defeated by the two of them, and he racked his brains to convince the teaching director who existed like the "Queen Mother", but he never thought that the two of them still had the heart to do the problem together.

It can be regarded as a mistake, and it has become the most evidence to persuade Director Xu.

What else can Director Xu say, a high school god, a junior high school god, the two of them will talk about early love and discuss advanced mathematics, what else can he say?