Shi'er passed by with a plate and bumped into Bai Jing, and when she saw that no one next to her was decisive, she didn't dare to stop her, and hurriedly ran to Zhou You's side: "Store manager, don't chase after it yet." ”

Now that she is traveling, she is so salted that she doesn't even have the heart to chase her.

"Let's get back to it. Zhou You waved his hand, bowed his head and drank porridge, "During this time, you should do the work she is responsible for first." ”

"I won't, it's super complicated. ”

"It doesn't matter, let's do it. Zhou You took a chopstick pickle from Shi'er's dinner plate.

"Oops. It was useless to be in a hurry, so he had to sit beside Zhou You, "I know you've lost something, but because of this, shouldn't you cherish what is in front of you more?"

"yes. Zhou You took a sip of porridge, "I work hard, study hard, treat people sincerely, honor my parents, I am responsible for my own profits and losses, I pay taxes for the country, I am a positive example for the school, and I also won the architecture award, and now the money in my hand far exceeds my desire to consume, what else do I want, Shi'er, build a city?"

"......" Shi Er was dumbfounded for a moment, and then sighed, "Store manager...... I am such a positive person, I am going to be mourned by you. At least, I mean at least, express some feelings to Bai Jing, don't be half-dead all day long. ”

"What do you express?" Zhou You glared at Bai Congee stupidly.

Shi Er leaned back on the chair and gestured: "Store manager, I read a book, which says that people live in caves, and they are in the cave all their lives, and they don't feel crowded and aggrieved and dark, and then one day, a person walks out of the cave and sees the outside world, and he can never go back, even if people go back, their hearts will always float outside." ”

"I know this, you must be looking at the fairy tale version, the original version of the cave parable is much deeper than this darkness. Zhou You grinned, "In the original story, the man returned to the cave and tried to tell his companions how beautiful the outside world was, and persuaded them to go out too, but his companions couldn't understand it at all, thought he was talking nonsense, defined him as a madman, imprisoned him, and even killed him, and the whole cave ended there." ”

"If that's the case, then he shouldn't have come back. Shi Er glared at Zhou You and said, "If you want to go out now, then go out, it's no big deal, no one will blame you." ”

"It's all gone, and I can't get out now. Zhou You gently stirred the coffee, "This is my choice, I didn't know until that moment that I would choose this way." ”

"Do you regret it now?"

"I don't know. ”

"What about another one?"

"I don't know. Zhou You looked out the window and saw Wanton who was carrying his schoolbag to school, and waved to greet her, but Wanton just nodded, nothing to say.

"What is this?" Shi Er suddenly looked at Zhou You's finger.

"This ...... It's stupid. Zhou You smiled dryly, "It's a very important ring, everything was too urgent at that time, he forgot to ask for it, and I forgot to return it." ”

"If it's important, he won't forget it. Shi Er nodded and said, "I don't know about the others, at least the Void Heavenly Spirit, she is the most rigorous and meticulous person I have ever met, and she will definitely not forget." ”

"It seems so. Zhou You looked back at the cold evil ring, which was the most expensive protective shield, and there was a small storage space, "But what if I stay?"

"That's a question you can only answer yourself, store manager. Shi Er also got up and left.

On this day, Zhou You's mood resettled, his brain hadn't been working for too long, he decided to pick up something a little, but he didn't want to touch π again, and wanted to put in some light and interesting thoughts.

The idea of a two-dimensional architect suddenly popped up, and after talking to Mu Qingyuan that time, he didn't have time to think about it properly.

So he leaned back in his chair, slowly closed his eyes, and began his journey of two-dimensional architecture in a state of no hurry and no result.

This time, he quickly entered a meditative state, and although he didn't feel those magical particles like he did in the Demon Plane, it was enough to make his mind run at a high speed.

A sphere came into being in his mind.

Wrong, it shouldn't be a sphere, the two dimensions should be a plane.

So he tried to unfold the sphere and lay it out.

But he couldn't.

The two-dimensional plane of the sphere is inhomogeneous and has curvature, like the skin of a watermelon, it is always curved unless its structure is destroyed.

So Zhou You gave up on this matter and continued to return the sphere to the sphere, imagining himself as a two-dimensional architect on the surface of the sphere, and the sphere is his architectural space.

Without much thought, he drew a random circle on the sphere, which was probably the most basic building here.

Buildings always have parameters, so he began to set the diameter of the circle.

The problem arises.

In the three-dimensional field of view, the circle is actually a cross-section of the sphere, a line of latitude with its center inside the sphere, and the radius is a line through the center of the circle.

But now I am a two-dimensional architect, living in a spherical world, and it is impossible to see the space beyond the sphere, that is, for a spherical two-dimensional creature, the center of this circle is on the surface of the sphere, so its diameter is no longer a straight line, but a line with an arc along the sphere, like a watermelon rind.

In other words, for the two architects who lived on the sphere, the diameter of the circle became longer.

But in the two-dimensional architect's field of vision, this diameter is still a straight line, because the curvature appears in a higher dimension, and he can't perceive it at all.

At this time, Zhou You instantly understood something, took out the straw paper and began to calculate frantically.

He first envisioned the most extreme scenario, drawing a circle along the equator.

For spherical two-dimensional organisms, the radius of the circle is the distance from the pole to the equator, and the value of the π is exactly 2.

As the latitude increases, continue to draw circles, and the value of the π begins to increase gradually until it reaches the pole, a small circle that is as idealized as possible, and its value will be infinitely close to 3.14.

This coincides with the observations of many planes, and a conclusion emerges -

Space is not flat, only the demon-free plane is relatively flat, but even in the demon-free plane, there will be distortions near the black hole and massive celestial bodies, and Zhou You has reason to believe that if there is an opportunity to measure the π value optically near the black hole, there will be deviations.

Zhou You grabbed the drafting paper and shouted excitedly: "Tianling, is it this, I found it! 2 to 3.14, it won't be wrong! I didn't read the math book and found it myself! Let you say I'm stupid!"

Even though he knew that mathematicians had studied this matter for a long time, and even though he knew that Einstein and Hawking had already written the calculations and conclusions clearly, he could not suppress the excitement of thinking.

But no one responded to him.

The Void Heavenly Spirit has long since left, and there is a hint of coolness in the empty office, I don't know if it is autumn or winter.

A sense of bitterness and loneliness that I had never felt before came to me.