“Humans commit crimes, and mathematics solves them!”
A full-fledged mathematical mystery unfolded by great mathematicians!

"Mathematicians Who Became Detectives" is a full-fledged mathematical mystery written by a math teacher and mystery novelist, and features mathematicians from history such as Euclid, Archimedes, Galileo, Descartes, Fermat, Gauss, and Cantor as main characters.
While the events are fictional, the mathematical concepts applied to problem solving are exactly like those found in actual textbooks! While engaging and engaging like a mystery novel, you'll naturally learn important mathematical concepts like definitions, axioms, center of gravity, falling motion, coordinates, probability, mean and variance, and infinity.

This book is perfect for students who want to learn the principles of mathematics in a fun way, teachers who want to use it in their discussion classes, and readers who love detective novels.

Socrates applauded his disciple's discovery and said:
“Excellent.
It is a conclusion reached by relying on logic and reason, not on the imperfect senses of humans.
A truth that transcends time and space.
As you have shown, we all have the power of logic and reason.
Truth does not create new things.
“It is seeing something that exists but has not been seen before.”
Socrates continued speaking slowly, his voice lowering slightly.
“But what’s more important is this.
“We must never stop at mathematics.”
--- p.14~15

"You asked what use learning math is? You, the one who asked the question, are the ones who gave the answer."
The man looked puzzled.
“Mathematics is a truth so useful in life that it can be used to catch thieves.”
After finishing speaking, Euclid opened the drawer under the desk.
“As a reward for helping me with my classes, I won’t turn you over to the authorities.”
The man ran out of Museion, wearing a torn toga and clutching a few coins in his hand.
--- p.40~41

I already knew that the trajectory was a 'parabola'.
Because at that time, the parabolic principle had just been proven.
Isn't fate truly ironic?
If I hadn't studied parabolas, I wouldn't have invented the catapult that kills people with stones.
Things are progressing as if they were preparing for this war in advance.
I couldn't help but wonder if there really was such a thing as an unavoidable fate.
--- p.54~55

“That’s not evidence.
“It’s a disguise technique commonly used by witches.”
“As evidence….
"Then how about this? Try it yourself."
The moment he heard the word experiment, Torricelli realized his master's plan.
Galileo pointed with his finger to the leaning tower in the distance.
“I’m dropping her from the top of that tower.
A witch who flies around every night on a broomstick wouldn't just fall down, would it? If she were to reveal her identity and fly away, everyone here would just shoot her down with flaming arrows.
If she falls down like that, it will be proof that she is not a witch.
“Can there be a more certain verification than this?”
--- p.72

“I couldn’t see outside because I was lying down and hiding inside the carriage.
but…"
Spino said, tapping the top of his left palm.
“I used the method the director taught me last time.
I measured the time with a pulse watch.
The carriage ride took thirty minutes.
The carriage traveled at a normal speed, so if we multiply this by the carriage's average speed of 9 kilometers per hour, the distance traveled would be 4.5 kilometers.
So the white building is within a 4.5 kilometer radius of where I got on the carriage.”
“Please continue speaking.”
“After I got out from under the carriage, I immediately asked a passerby I met to confirm the time.
It was 9:20 at night.
When the carriage started, the church bell rang nine times, so my second carriage ride took a total of twenty minutes.
That is, the distance traveled is 3 kilometers.”
--- p.102~103

Fermat spoke in a low voice, clearly and distinctly.
“The possibility presented by the lawyer… For convenience, let’s call it probability.
The odds are that a woman who is assaulted by her husband will be murdered by her husband.
“Right?”
The defendant glared at the judge with a beast-like expression.
“But things are a little different now.
“The only meaningful probability here is that the cause of death of a woman who died after being beaten by her husband was the husband’s beating.”
A sneer escaped the lawyer's lips.
“Don’t play with words, Your Honor.
“What’s the difference?”
--- p.126~127

"professor.
When will this terrible disease leave us? Is it impossible to predict such a thing mathematically?”
It was a great mathematics that calculated the movement of stars and predicted the future, but it was useless against a devilish epidemic.
At least for now.
Gauss bit his lip as he looked at Tobias' empty seat.
There was an unbridgeable gap between understanding that a disease occurred according to a normal distribution and being able to eradicate that disease.
“There is no room to set foot in the hospital in my aunt’s village anymore.
It seemed like there were more patients than in our town.
It's been like that from the beginning.
Maybe my aunt….”
Something came to the old professor's mind as he watched his student swallowing his tears.
--- p.151

So, does this mean that the concept of 'all (infinite)' contains a contradiction?
Poincaré's words that set theory was a disease pierced Cantor's heart.
I believed that we could calculate infinity and reach the essence of numbers using the concept of sets… .
'If I don't solve this problem, my colleagues won't recognize me.
But… can I solve this problem? No, is this a problem anyone can solve? Or… could it be… that this is all a figment of my imagination?

--- p.171