After changing into clean clothes, Yan Xiuze casually had breakfast in the villa under Ou Cheng's name, and then set off for the headquarters of the Alliance of Liberals, which was built on the outskirts of Reykjavík.
However, he had not come here to meet his friends who belonged to the Alliance of the Liberals, but to be another guest.
Scan Start Yan Xiuze stood in front of an electronic door and honestly accepted the scan.
After a while, an electronic voice sounded again without any emotional fluctuations: "Identity confirmed, Supreme Authority." ” "Welcome, Mr.
Yan Xiuze."
The electronic door slowly opened, Yan Xiuze didn't stop too long, and walked in directly.
And there was already a person waiting in the door early, who was holding his hands behind his back at this time, leaving only Yan Xiuze with a back.
The person who was originally staying indoors also seemed to be aware of Yan Xiuze's arrival, subconsciously stroked a strand of red rope tied to the back of his head, and slowly turned around: "Earlier than I expected, your body's conditioning ability is unexpectedly good."
"Instructor" Yan Xiuze looked at the old man in front of him who had wrinkles on his face and was no longer young, and said softly.
"Why does it seem that your super physique seems to be much stronger than when you traveled before, is it the change that occurred when you passed through the wormhole, or did you have another adventure in that parallel world" The instructor was obviously very interested in Yan Xiuze's physical changes and asked.
"It's a long story, it's a bit of an encounter, but it has nothing to do with crossing a wormhole."
Yan Xiuze said helplessly.
"But I guess that since you asked me to meet here early, it must have a lot to do with wormhole crossing," the instructor quipped.
"Well, indeed" Yan Xiuze couldn't help but glance at the red rope tied to the back of the horsetail of the instructor's head, and hesitated: "I really have doubts about this, I want to ask you." ” "But should I continue to call you Instructor, or should I call you Professor Zhou Jianping?"
"Name, just a code name."
The instructor suddenly looked a little lonely, and waved his hand: "If you pick your name, it will become Zhou Jianping, heh, no one has called me by this name for many years." ” "But now that you know my real name, you must have seen me in another world."
"Well, that's right, it's really thanks to that Professor Zhou that I was able to come back this time."
The instructor opened his mouth, as if to ask something, but in the end he swallowed the question he had already raised in his throat and did not speak.
"Okay, without further ado, you can ask me whatever you want."
After a while, the instructor said slowly: "But I said it in advance, I have actually been distracted by a large part of my martial arts over the years, so when it comes to physical level, I may not be as good as the other person in the parallel world." ” "I can't answer your question, but it's not necessarily."
"No, it's not a complicated problem, it's really about physics."
Yan Xiuze scratched his head and asked, "That, instructor, do you think that the universe we are in has a boundary?"
The instructor narrowed his eyes and looked at Yan Xiuze in front of him with a scrutinizing gaze.
Yan Xiuze was a little furious by his gaze, and hurriedly said, "Can you stop staring at me like this?"
"I'm sorry, I'm just a little suspicious of your identity right now."
The instructor tugged at the corners of his mouth and teased: "I remember teaching you similar knowledge twenty years ago, why, it's only been a few months for you, and the little knowledge you learned before has been returned to me."
"That's not it, I just want to check with you again."
Yan Xiuze smiled bitterly.
"Okay, although I don't know what medicine is sold in your gourd, I should consider it for you to review your homework."
The instructor cleared his throat and said, "Although the jury has not yet been reached on whether the universe is infinite, there is a more mainstream view, and one that I myself support, that is, finite and unbounded. ” "Limited and unbounded" Yan Xiuze nodded silently, which was basically consistent with his previous conjecture.
"The so-called finite and unbounded is actually very simple to explain."
The instructor continued: "We believe that the universe is not actually infinite, but it has no boundaries or that there is no way to reach its boundaries with the technology of the three-dimensional world alone. ” As he spoke, the instructor's palm suddenly emitted a faint milky white light, and he used the holographic projection technology in the room to unfold a translucent "white paper".
"It might be hard to understand this, I'll explain it to you with a projection."
The instructor's other hand dotted a few times in the air, and dotted a few small black dots on the white paper suspended in mid-air: "Suppose that we now land in a dimension and imagine our world as a two-dimensional world. ” "Then, we three-dimensional creatures will become two-dimensional paper people."
As the instructor spoke, the small black dots that fell on the white paper turned into vivid "black villains".
"Let's say we're these little black people, trying to find the boundaries of our world."
As he spoke, the instructor manipulated the little black figures to move towards the edge.
And when the black figure moves to the "border" of the white paper, it can no longer move forward.
"Seeing that without us now that we have reached the boundary of the world, it is impossible to move one step further, because this two-dimensional paper world is so big."
The instructor said lightly: "But what if this piece of paper world has no boundaries?"
As he spoke, the blank piece of paper in the instructor's palm began to expand rapidly, eventually filling the entire room.
"But then it's infinite."
Yan Xiuze shrugged.
"It seems that I still remember the knowledge of the past" The instructor laughed, put away the "white paper" that spread out the entire room, and let it change to its original size: "You are right, in this way, this paper world is infinite, and it obviously does not support my previous view of finite and unbounded." ” "In fact, this is what ordinary people think, who often think that the universe we live in is an expanding sphere, or simply an infinite space, but in fact it is very likely that this is not the case."
The instructor put away his smile, and the white paper in his palm began to "roll" together, and after a while, it became a round "sphere" without any edges and corners.
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"Continuing with the previous assumption, what if we lived in a world of paper that was not tiled, but the spherical surface of a sphere":