Genius Girlfriend

At 8 o'clock in the morning, Jiang Yubai appeared on time. When he saw Lin Zhixia, he naturally held her, and said to her: "I dreamed of you last night."

"What did I do in your dream?" Lin Zhixia asked curiously.

Jiang Yubai avoided answering. He asked about Lin Zhixia's research progress, and Lin Zhixia opened him up: "Are you changing the subject?"

He even admitted: "Yes."

Lin Zhixia hugged his arm and continued to explore: "What did you dream of? Tell me quickly."

Jiang Yubai began to delay: "Let's talk about it when you get to my house."

In this way, Lin Zhixia followed him home.

They walked through the corridor and passed by a concert hall with a grand piano. Lin Zhixia glanced, Jiang Yubai pushed open the side door of the concert hall.

Lin Zhixia followed him step by step, like a little tail that couldn't be shaken off. She said: "I want to listen to "Autumn Whispers", you play it to me."

Jiang Yubai began to play "Autumn Whispers". He hasn't touched the piano for more than two months and is looking for the feel. He didn't open the huge lid of the grand piano, and the sound of music between his fingers seemed deep and soft.

Lin Zhixia stood by his side and observed him.

His piano suddenly stopped.

He put his arms around Lin Zhixia's waist, and when he tried harder, he picked her up. With her feet hanging in the air, she was a little frightened, but didn't struggle, and just asked him: "What do you want to do?"

Jiang Yubai asked her to sit on the piano cover. She asked back: "Will I break your piano?"

"You are so light," Jiang Yubai said, "it is impossible to sit down."

Lin Zhixia thought: I also have more than 40 kilograms.

In front of the floor-to-ceiling windows, there were lush woods, and a thin green shadow sifted down by the tulle curtain, which happened to be projected on the pure black piano cover.

Jiang Yubai sat on the piano stool again and played only the interrupted piece with his right hand. His left hand grabbed Lin Zhixia's wrist. She watched him lower his head, kiss the back of her hand, and kiss her fingertips again.

He said: "This is my dream last night."

At this moment, he squeezed her finger tightly, and the emotion moved deeper.

Lin Zhixia did not give any response.

She jumped off the piano cover, her hands were numb, her legs were soft, and her thinking was chaotic. She suddenly discovered that many things cannot be simulated by imagination alone. For example, she has been a literary masterpiece since she was a child, but she has never understood why the clever protagonist often stumbles on the road of searching for love.

Now, she herself clearly tasted the strange taste that she could not help herself.

Lin Zhixia's heart beats like a drum.

Jiang Yubai thought she could say a few words, but she was very quiet. He suspected that his actions were still a bit abrupt. In order to break the silence, he proposed: "Let's go to the study to study."

Lin Zhixia responded quickly: "Okay."

Jiang Yubai stretched out a hand to her. She immediately held him and clasped his fingers, and they dropped in to the study.

The study room is well-lit, and rows of bookshelves stand tall, like a small library. The indoor carpet is embroidered with exquisite patterns, a computer and a stack of papers are placed on the long ebony table by the window, and there are two engineering chairs with adjusted heights on the side of the table-this is obviously Jiang Yubaihe Lin Zhixia's seat.

Lin Zhixia sat down slowly, and said in a posture: "Sit down, too. From now on, I will be the teacher you hired."

"Mr. Lin." Jiang Yu said in white.

Lin Zhixia nodded: "Yes, we need to learn. When I am tutoring you, you call me Teacher Lin and don't change your mind."

Jiang Yubai pushed the edge of the table, the chair rolled and slid, and the distance between him and Lin Zhixia became closer: "Mr. Lin, have you taught other students?"

"Yes," Lin Zhixia spread out a textbook, "Don't worry, I have rich teaching experience."

The harder Lin Zhixia tried to put on an official business, the more Jiang Yubai wanted to exceed the safety line of the "tutor and student" relationship. He said: "The students you have taught before are probably your classmates, and their foundation is better than mine."

Lin Zhixia stared at him suspiciously.

In the fourth grade of elementary school, he often compares his grades with her.

After going to university, he would even claim that "Your classmates have a better foundation than me."

Did Jiang Yubai ask her for tuition, or was he playing role-playing games with her?

One of Lin Zhixia's life hobbies is role playing. She was full of interest and patiently cooperated: "Don't worry, the test sites for each course are limited, and your potential is unlimited."

Jiang Yubai took out a course material and put it in front of Lin Zhixia.

Lin Zhixia flipped it casually and saw that the last page of the catalog listed the mathematical foundations that this course needs to use, including linear algebra, advanced mathematics, probability theory, and statistical methods. Some categories are also marked below each category. Specific knowledge points, such as the column of probability theory, there are ExpectationandRegressionFun (expectation and regression function) LawofLargeNumbersaralLimitTheorem (law of large numbers and central limit theorem) [1] and so on.

Lin Zhixia asked particularly responsibly: "You tell me first, what content you don't understand?"

Jiang Yubai picked up a pen: "I'm not sure, I don't understand."

Lin Zhixia and Jiang Yubai had been at the same table for four years. She taught him many times and wrote a problem-solving notebook for him. Since graduating from junior high school, she has never coached him hand in hand.

She missed the old days.

She said more seriously: "That's it, you explain it to me again, starting from the first knowledge point..."

Jiang Yubai started with "regression function". When he talked about "central limit theorem", his pen fell on the table. So he paused, pointed to the line of English, and asked in a low voice: "Mr. Lin, what is the central limit theorem?"

He doesn't even understand the "central limit theorem"?

Lin Zhixia briefly summarized: "This paper uses the most common expression of the Central Limit Theorem. Suppose you have a distribution containing independent random variables, the number of random variables is limited, the mean is M, and the variance is D, you draw multiple groups of samples from this distribution, and each group takes the average value a. After standardization, a1, a2...an will converge to a normal distribution."

She looked at him sideways: "The central limit theorem is one of the most important theories in Probability Theory. We can continue to expand it. You will find that the samples from the Cauchy distribution do not apply to this theorem. Why?"

Jiang Yubai's right index finger tapped lightly on the desktop: "Mr. Lin."

"What's the matter?" Lin Zhixia blinked.

Jiang Yubai's voice is particularly pleasant: "Can you..."

"Ok?"

"Sit on my lap."

Hearing his request, Lin Zhixia was stunned for a second.

Jiang Yubai gave his reasons. He said that Lin Zhixia was closer to him and he heard more clearly. He wrote in the notebook, and Lin Zhixia could add content next to him. In this way, they would be more efficient in checking and filling vacancies.

Lin Zhixia remembered that she used a feather to tease the little cat in Jiang Yubai's house. At this moment, all Jiang Yubai's words turned into a feather and fell on her heart.

She leaned on his shoulders, stood up, and sat on his legs.

Before Lin Zhixia sat down, Jiang Yubai wrapped her left arm around her waist, still holding a pen in her right hand. He reminded her politely: "We just talked about the Cauchy distribution, Teacher Lin."

Teacher Lin's breathing disorder: "Well, I remember." Then he said: "I will give you a question, if you get it right..."

"Are there any rewards?" Jiang Yubai asked in her ear.

"I'll kiss you." Lin Zhixia declared.

Last night, Jiang Yubai had a dream.

He not only dreamed of the scene in the piano room, but also dreamed of Lin Zhixia sitting on his lap. So far, his dreams have come true. Lin Zhixia not only showed no repulsion, but was also willing to play with him the game "If you get the right answer, I will kiss you".

Jiang Yubai flattened out a piece of draft paper and asked Teacher Tolin to write the question politely.

There was only one pen on the desk, and Jiang Yubai held that pen in his hand. Lin Zhixia held his index finger and scratched it gently, and he immediately gave her the pen. Just ignore his left hand around her waist, he is a good student who is gentle and respectful.

Lin Zhixia wrote the probability density function of the Cauchy distribution on paper. Before she finished writing, Jiang Yubai asked her: "Are you still teaching me the central limit theorem?"

"Yes." Lin Zhixia released the pen.

It was the first time that she sat on Jiang Yubai's lap to teach, her thoughts were full of thoughts, where could she calm down and talk to him?

She asked a very simple question: "You will find that the sample from the Cauchy distribution does not apply to this theorem. Why?"

If Jiang Yubai answered correctly, Lin Zhixia would kiss him. She did not formulate detailed rules, and did not mention the upper limit of the reward, which means that Jiang Yubai can keep asking her for kisses-what will happen afterwards? He was afraid that he would be uncontrollable.

Jiang Yubai pondered for a moment, stifling all non-particular desires in the bud. He even replied: "I'm sorry, Teacher Lin, I haven't learned Cauchy distribution."

He said this very sincerely.

Lin Zhixia believed it was true.

She did not expect Jiang Yubai's mathematical foundation to be so weak.

She explained the Cauchy distribution meticulously, and mentioned that one of the constraints of the central limit theorem is that the mean and variance of the probability density function exist and are limited, so the Cauchy distribution does not apply to the central limit theorem [2].

Lin Zhixia added: "The result of group sampling from the Cauchy distribution for mean normalization..."

Jiang Yubai said: "The result is not Gaussian distribution, but Cauchy distribution."

"That's right!" Lin Zhixia was surprised.

Lin Zhixia thought that her teaching was very successful.

As Jiang Yubai's tutor, Lin Zhixia loves her job, is dedicated to her duties, and speaks well. She turned her head quietly, and kissed his profile.

Jiang Yubai remained silent, raised his chin slightly, and his eyes fell on the bookcase in the distance. He tightened his hand around her waist, but he didn't even call "Ms. Lin", but Lin Zhixia thought he was very funny, making her unpredictable and all kinds of reactions unpredictable.

Lin Zhixia sat sideways on his lap, hooked his neck with both hands, and stared at his Adam's apple.

Lin Zhixia has a strong and strong curiosity. Jiang Yubai has Adam's apple, but she doesn't, she wants to know what it feels like to grow such a thing. She was close to his neck, and the warm and subtle breathing air stream grazed from the side of his neck. He did not speak, nor stopped her.

When he first started playing the "family teacher playing game", Jiang Yubai still had many scenarios and many dialogue modes. But now, he is transformed into a sculpture of resignation, quiet and self-sustaining and frosty, like being enshrined in a noble and holy temple.

Lin Zhixia felt more and more interesting and wonderful.

She gently kissed the bulge of his neck, as if touching an incredible switch. Jiang Yubai squeezed the armrest of the seat with both hands and called her again: "Mr. Lin."

so fun.

Their role-playing game is still going on.

Lin Zhixia said carefully: "I...I haven't taken the college entrance examination, and my biology is not good..."

She was about to say, "You come to teach me things," Jiang Yubai interrupted her: "I haven't taken the college entrance examination, how can I be a tutor?"

As soon as this sentence came out, Lin Zhixia was confused.

Lin Zhixia confidently told him: "Many of my undergraduate classmates are recommended, and so am I."

Jiang Yubai finally turned the topic to the normal direction. His once tense nerves eased slightly, and he did not lose his stance in front of Lin Zhixia. He wanted to have further contact with her, but fortunately he finally resisted it. He calmly said, "Mr. Lin, let's continue studying."

Lin Zhixia's brain circuit is completely different from Jiang Yubai. She asked him very bluntly: "How did you feel when I kissed you? You tell me, I want to know. I want to write your words in the diary."

Jiang Yubai spread out a paper. He translated English into Chinese and read an abstract in a low voice, as if treating the paper as "Clean Heart Mantra." Lin Zhixia said, "You still don't answer me. This is the teacher's order."