Chapter 6: equation

The aroma of squid tofu soup at home has not been finished. Lin returned to her room in the evening, and she was quiet in the night. She also had a review of the teacher's exam on her desk.
After the old forest is sick, it is no different from the stick.
Sometimes I suddenly recall the past, sometimes licking chicken soup, and suddenly tortured the soul. Lin Zhaoxi tried his best not to think about the last few words of Lao Lin, but how can he not?
As the daughter of a former mathematician, her mathematical foundation is indeed not bad.
When she was a child, not only was her old mathematics enlightenment very outrageous, she was also very interested in mathematics, and even every time she went to the Olympic class, she was very happy.
If she persists in the path of her youth, she will not become such a powerful person, but she will not feel inferior when she is facing the problem.
But I don't know when she started to go to class and no longer read any books related to mathematics in the library.
She is afraid of mathematics, she is scared and bored, and she deeply believes that it is a field of genius, which is difficult for mortals.
Thinking of that time, Lin Chaoxi was chilling, and quickly stopped his thinking.
The road to life has been biased long ago, so let’s do it. The most important thing now is Comrade Lao Lin.
Lin Chaoxi hurriedly licked his face, turned on the computer, found the content of the living environment for Alzheimer's patients, and prepared to toss something that was not so easy to think about.
Alzheimer's manifests itself as a short-term memory decline, but long-term memory can be evoked.
So, you can put things that make them feel comfortable and happy at home, such as nostalgic photos, favorite plants...
Alzheimer's patients often can't tell which one is their own, so you can make special marks on the door to help them distinguish.
Lin Chaoxi pulled a note and wrote down the notes.
What can make Lao Lin feel comfortable and happy, still have nostalgia?
Is she looking for a proof of the Fermat's theorem to hang on the wall?
At the thought of the future, the home may be full of walls of mathematical theorem formula, but it really feels a bit.
Lin Zhaoxi finished reading a bunch of materials and summed up the main points. The first problem is that Lao Lin is easy to forget to bring the key. If the key is used, it can be solved by changing the fingerprint lock.
But the new village they live in now is a large-scale old-fashioned residential area, with hundreds of buildings, each with a small courtyard downstairs. If the old forest comes out, it is easy to see these courtyards that look like the same.
Have to make a fuss on the door and the fence...
She stuffed the note into the pocket and changed her shoes.
It was late at night, and the street lights in the old residential area were sporadic. There was no other sound except the sound of the wild cats.
She walked through the patio, plucked the morning glory on the slanted door frame and stood outside the courtyard wall.
At her feet, there is a whole box of chalk.
She looked up and looked at the entire wall.
When they were young, they lived in a small bungalow in the city center. Although the house was leaking, there was a small patio. Lao Lin works during the day and at the restaurant side plate at night.
At nine o'clock in the evening, she will sit at the door of the house and wait for the old forest.
The summer night is beautiful, and the old forest always comes back with a small snack, never getting tired.
They sat down on the patio under the loofah vine to eat snacks together, and Lao Lin had to rob her every time, extremely shameless.
While eating, the old forest side will talk about all sorts of messy science stories. What Pasteur discovered the hidden asymmetry of hydrochloric acid crystals, Franklin and lightning rods...
The nearby children will come together to listen. After all, Lao Lin is really interesting to tell the story.
Only one time is especially fun.
When Lao Lin was telling a story, he was smashed by the son of a nearby professor.
The second child is more terrible than the second child. The children said that Lao Lin’s things are not used, and the real science is extremely difficult. Lao Lin is fooling them with a fool story.
In fact, there is nothing wrong with it...
But the child began to recite Newton's three laws and the Pythagorean theorem on the spot, which is more scary.
Lao Lin didn’t say anything at first, and he smiled. When the children finished a series of formulas, Lao Lin stood up and made a piece of things that Lin Xiangxi now wants to come to be very second.
He took the child's hand and walked out the door. He took a small piece of red brick on the side of the road, and on the street lamp, wrote a formula on the courtyard wall.
e=mc2 (square)
Lao Lin: "Do you know what this is?"
"Einstein!" The little boy said proudly, "Relativity!"
Lao Lin is undecided, picks up the small bricks, writes another formula with more complicated points on the wall, and asks: "What about this?"
The second formula starts with r, with more superscripts and subscripts.
Lin Xixi was blind, and the little boy could not speak.
But if this time stops, it is not Lao Lin, he continues to write, the third is the expression, the things that are expanded with the brackets...
Anyway, Lin did not understand.
After writing this, Lao Lin has not stopped, and the formula of the formula theorem is not a verbal description.
One after another, the formula is accompanied by the bricks in the hands of Lao Lin, and gradually emerges under the glimmer of streetlights. They are sprinkled until they are covered with the entire courtyard wall.
In the end, Lao Lin threw away the red bricks that were written with only a few scattered points and said to the little boy, "Do you continue to recognize?"
Lao Lin looks at the second, very proud.
The little boy was flushed and couldn’t speak.
After a while, Lao Lin slowly walked to the equation of the second r he wrote, but the tone was unexpectedly calm.
He said: "This is the field equation in general relativity."
"This is a special relativity expression."
"This is the Dirac equation."
"This is the Chen-Gauss-Bonne theorem."
"This is the Lorenz equation."
"..."
"This is Maxwell's equations."
Finally, Lao Lin slowly returned to e=mc2 (square) and said, "And this is not relativity, it is the Einstein energy equation."
Speaking of this, the little boy finally cried awkwardly. A group of children looked up at the wall formula and was at a loss.
At that time, Lao Lin squatted down and wiped the tears with the dirty hands on his back. He also asked, "Why are you crying?"
The suffocated children can't say anything else except crying.
Lao Lin said to himself: "I feel that I am an adult who bullies you. I feel that I am very embarrassed in front of the children. Do you think these formulas are too difficult to collapse?"
Lao Lin: "But you just made the same thing as me in front of other children."
"Is it really annoying to show off if you remember yourself?"
The little boy cried even louder. Lin looked around and looked around. He was afraid that the boy’s family would rush out and beat Lao Lin.
However, Lao Lin, I will care about these ghosts.
"There are always people who are better than you," said Lao Lin.
"When you only remember the formula on the surface, just a person who has more than you will make you heartbroken."
"Why? Because you don't know anything about it."
"There will be a formula, you only see those broken characters and others boast of your great eyes, but in fact, these..." Lao Lin poked the entire wall and single-handedly on top of them. The sky is full of stars, "It is that."
"star?"
Lin whispered to himself, and then received a chestnut of the old man.
"Please call it the universe."
"Oh."
If, next, the children ask what is the universe, then the story will become endless. Obviously, close to nine o'clock in the evening, most of the children have no patience to listen to a courageous youth telling the cosmic truth behind each formula.
So when Lao Lin talked about Pythagorean theorem, people were almost the same.
Lao Lin is talking about rising, and once he is back, there is only the little boy who was crying before.
Lin Chaoxi looked at them at the door and yawned.
Lao Lin then threw the bricks and began to sum up his remarks: "In summary, it is meaningless to memorize the formula. You can't understand the true meaning behind them at your age, so what about my interesting science story?

Lin Zhaoxi: "..."
Little boy: "I... my dad said... I will back."
"What your father said is not true to her father."
At that time, she was already sleepy, but she vaguely remembered that Lao Lin pointed at her and said with pride.
In short, in her memory, this is a very outrageous story.
Lao Lin is full of enthusiasm, and will hold the children to brainwashing science education.
And she is still small, in front of a long and full of all possible life paths.
Unlike now...
Not at all.
The phone shook, and Lin returned to God.
She lights up the screen with a WeChat message on it.
Xiao Liu--[My father knows the director of the brain department of the Sixth Hospital and will have dinner together tomorrow. I will introduce you. 】
Holding her phone and raising her eyes, she took a deep breath.
In front of the wood color door panel, she bent down, picked up the chalk on the ground, step forward, and wrote the first formula that Lao Lin wrote on the wall.
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