A full-fledged math novel for young adults from bestselling author Go Jeong-wook.
The equation of the mathematical genius and the postulate of the mathematical genius,
There is no problem that the two of them cannot solve together!
Life's greatest challenge is math, but I found the answer in math.

Author Goh Jeong-wook says it is unfortunate that young people only feel the need for math because of the pain of college entrance exams and say they wish there was no such thing as math.
There is perhaps an aspect of it that makes sense, since I think of math as a test, as life, as something that determines one's life.
But the author confidently says that mathematics is not like that.
I hope you will fall in love with the allure of mathematics because it solves problems, improves my life, brings happiness, and brings peace.

But what good will all this talk do if young people see math as a headache, the greatest challenge of their lives? So the author came up with a story that would make math a little easier and more fun.
It's the meeting of Gong Jun-pyo, a dropout, and the math genius Equation! Gong Jun-pyo, a third-year middle school student, moves from Seoul to Noksan City due to financial difficulties at home.
He becomes friends with Se-in, who is known as a math genius, by chance.

One day, three children decide to find a gilt-bronze Buddha statue that was lost at Noksansa Temple due to a landslide and collect a reward for it... Instead of just going out to find the statue, they try to find it using mathematical formulas and calculations.
In the process, Gong Jun-pyo learns the basics of elementary school and middle school mathematics again with the help of equations, and finds mathematics interesting.
The protagonist, Gong Jun-pyo, experiences the greatest wandering of his life due to his father's business failure, anxiety about the future, and dissatisfaction with the poverty that permeates his daily life.
However, through the unchanging friendship between Se-in and the equation and the process of finding the answer to mathematics with them, he gets closer to the answer to his own life.
Young readers will also discover the charm of mathematics more easily and quickly through the mathematical problems and life stories that Se-in solves together with the gongjunpyo and equations.

The car veered precariously down the winding road in the valley.
Then suddenly a sound was heard from the mountain.
“What are you talking about? There’s no wind….”
At that moment, Junpyo, who was looking at the back of the car, shouted urgently.
“Dad! There was a landslide on the road we just came from.”
"what?"
Looking in the rearview mirror, I saw that the road I had just passed was blocked by a tidal wave of dirt and trees.
"This was a close call! We need to get out of here quickly!"
Dad stepped on the accelerator, sweat dripping down his face.
As he was slipping down the rainy road, Junpyo saw another huge landslide coming down.
“Dad, over there again!”
A black landslide was engulfing Noksansa Temple.
---From "Moving in the Rainy Season"

The mother was so shocked by the scene that she could not believe it and just shed tears.
Dad started laughing like he had lost his mind.
“Huh! Huh! Hung!”
The only one who came to his senses was Junpyo.
“I will report it.”
After dialing 119 and getting connected, Junpyo shouted urgently.
“Hello! Hello! Is this 119?”
“Yes, what’s going on?”
“A landslide occurred and my car was swept away.
We were on our way to Noksan.”
“Don’t panic.
“According to GPS, it says you are on Route 239. Is that correct?”
“I don’t know about that.
It was the road going down from Noksansa Temple towards Noksan City.
“Noksansa Temple was also covered with a pile of dirt.”
“Please calm down.
Please call the number on the telephone pole or streetlight next to you.
“There are a lot of calls right now because of the landslide. Is there anywhere you can take refuge?”
---From "Three Families in the Emergency Room"

As I was slowly leaving the shopping district, I smelled oil in the market alley.
I suddenly felt hungry.
There was a ten thousand won bill in my pocket.
As I was looking around for a snack bar where I could eat fried food and tteokbokki, I saw a boy surrounded by girls at the entrance of an alley, begging for something.
Looking closely, I saw three girls surrounding the boy, hurling curses at him and not giving him anything in return.
"don't do it.
“Give it back.”
“That’s why you should have shown me the answers when I took the math test.”
“Uh, I’m sorry.
“I will teach you.”
“Who wants to learn from you? Just show them the answers.”
What the girl was holding looked like a stack of photocopied documents.
“Showing test questions is cheating.
So I'll teach you."
"Hey, why am I learning math, which is so unlucky? If you just shifted a little, I could see the answer."
The boy was still struggling.
It seemed like the girls treated the boys like complete bugs.
---From "The Peculiar Child"

That evening, Dad couldn't solve the problem.
“This is a combination of equations, functions, and sets.
Oh, that's difficult.
“A kid from your class solved this?”
“Yes, he’s a math genius.”
“Wow! There was a monster in our hometown.”
“Dad, how can I go to school if I can’t even do this?”
“Just show me the correct answer, how to solve it, memorize it, and teach me.
All Dad needs to know is high school math problems.
“I think this is a high-level math problem.”
“Is the problem that high-level?”
"huh."
At that moment, Junpyo felt a little respect for Jeongsik.
And I somehow liked this 'otaku' type of guy who solved such difficult math problems every day.
---From "Girlfriend Kang Se-in"

Jeongsik, who was scratching his head, asked.
“Since when did you start hating math?”
“You know, those annoying symbols like x, y, and stuff like that? That’s when it started.”
“Hahaha! An equation! It’s the same as my name.”
“That’s right, equations! I really hated equations, but I’m getting along with human equations!”
“The equation is really easy.
“Would you like to try to solve this?”
Jeongsik wrote the problem on a white piece of paper.
2+x =7
“What is x here?”
“Hey! No matter what, you think I can’t solve this? It’s 5.”
“You’re very good! Substituting numbers instead of symbols like that is called ‘substitution.’ If you substitute 5, this equation doesn’t hold true.
“You know that an equation is equal (=)?”
“Yeah, it’s the same.
“At my previous school, my math teacher always said, ‘Ikor.’”

Jeongsik pointed to the equation written on the paper again with a serious expression.
“Let’s call the left side of this equalizer the ‘left side’ and the right side the ‘right side.’
An equation is an equality.
In other words, the 'equation' must be established.
As you said, the equation is the same.
2+5 is the same as the 7 on the right, right? The equation is valid.
This is what we call an equation.
And the number that replaces x is called ‘hae.’”
---From "Mathematics We Met Again"

“Junpyo, what is your dream?”
“Me?”
“Yeah, you.”
“I just wish I had a lot of money.”
“Money again?”
"yes.
After my dad quit his job, even the chicken restaurant went bankrupt.
Then I realized I wasn't treated like a human being.”
As I moved, I encountered a landslide, and images of my parents struggling to make ends meet while opening a private academy flashed before my eyes.
“Yes, money is important for people to make a living.
But if money itself becomes the goal, it becomes a bit difficult.
If you find something you really love and can do for the rest of your life without getting tired, you'll find that money means nothing.”
Something hot rose up in Junpyo's chest.
“Teacher, that sounds like something Confucius would say!”
Children's complaints erupted here and there.
“Oh, latte latte.”
Junpyo's head started hurting as he thought about what kind of dream he should have to make money and make his mom and dad comfortable.
I couldn't come up with a dream at all, so I collapsed into my seat.
This time the teacher pointed to Jeongsik.
“Math genius Jeongsik, what is your dream?”
"Me? My dream is to solve the seven Millennium Puzzles."
“Millennium puzzle?”
“These are difficult problems that even the greatest mathematicians could not solve.”
---From "Millennium Challenges"

Congratulations on your opening! We wish you the best of luck in the future!
There was no more luck for Junpyo's family.
Junpyo went outside and went to the bridge over the stream, leaned against the railing, and looked down at the flowing water.
Watching the water flow endlessly seemed to calm my mind a little.
As time passed, the anger that seemed to be about to explode began to subside.
On the one hand, I also thought that even without me, people would continue to live their lives, each busy trying to make a living, like flowing water.

'Should I jump and die?'
But it wasn't a bridge high enough to jump off and die.
'If you jump down, you'll only end up with a dog.'
I was standing blankly on the bridge when Jeongsik called out from behind.
“Junpyo, what are you doing? Are you going to jump?”
My heart ached as if I had been caught.
Jeongsik, who was approaching with a big smile, was about to play a prank, but was startled when he saw Junpyo's dark face.
“What’s going on?”
“Our academy is closed.”
“What? Why? You don’t have to pay rent.”
“The problem isn’t not paying rent.
If you can't make money, you're doomed.
They even took all the computers and printers at the academy.
“The interior designer.”
“Oh my!”

I put my arms on the bridge railing and looked down at the water flowing together.
Jeongsik, who was watching, patted Junpyo's shoulder with his thick hand.
“I know because my house was ruined, but that’s not ruined.”

---From "Ramanujan"