This is the pattern that can be discovered so far. As for what is behind "reincarnation", no one knows.

quiet.

After a while, Koizumi Hongzi poked the floor with her hand, "Xiao Mei is a magical creature, so Xiao Mei is not included, right?"

Chi Feichi: "It should be."

quiet.

After a while, Koizumi Hongzi couldn't hold it in any longer, "What have you been doing recently?"

Chi Feichi said truthfully, "Yirong went to Lutai Town to investigate some things."

quiet.

Koizumi Anko asked again, "Has Kaito contacted you?"

"Nothing in the past two days..." Chi Feichi turned to look at Koizumi Hongzi, "If you feel bored, find something to do?"

Koizumi Hongzi's eyes lit up and she nodded repeatedly, "Okay, okay."

Chi Feichi thought for a while, "Then let's try to prove the Poincaré conjecture. The Poincaré conjecture was first proposed by the French mathematician Poincaré. It seems that it has not been proven yet..."

Koizumi Hongzi: "..."

There is an ominous premonition.

"In 1900, Poincaré claimed that he could determine whether a three-dimensional manifold was a three-dimensional sphere using the homology theory he developed based on the work of Enrico Betti. However, in a paper he published in 1904

, giving a counterexample..."

Chi Feichi patiently explained to Koizumi Hongzi.

In a previous life, in 2006, the mathematical community believed that the Poincaré conjecture was proved by the Russian mathematician Grigory Perelman, but it has not been proven in this life.

He is not a professional in mathematics and doesn't think he can compete with those big guys, but he can use it to pass the time.

"Wait a minute," Koizumi Hongzi stopped, "Don't talk about this, I don't understand."

"It doesn't matter if you don't understand," Chi Feichi said, "Let me tell you, see if you can fall asleep. I've tried it here, but I can't sleep and can't leave. If you fall asleep, you might be able to leave."

Koizumi Hongzi nodded, "Okay, let's try it."

"Then let me continue," Chi Feichi continued, "In 1904, Poincaré gave a counterexample in his paper, which is now called the Poincaré homology sphere and has the same homology group as the three-dimensional sphere..."

I don't know how much time passed, but Koizumi Hongzi sat with her hands on her knees and her eyes wide open with a dull look on her face.

Everything may disappear with time, but mathematics will not...if mathematics does not, it will not!

If she is guilty, God can punish her with thunder and burn her to death instead of sending the evil son of nature to torture her...

Chi Feichi paused, "Can't sleep?"

Koizumi Anko nodded weakly, "I want to sleep, but I can't."

Chi Feichi thought for a moment, "Then I won't prove it for the time being. Let's change it to a high school math problem that you can understand..."
Chapter completed!