The bone of sin domain is king

Chapter 225 No.40 Scene Eight. Promenade
Both sides of the promenade are stained glass, depicting solemn patterns with religious meaning, gorgeous curtains rolled up, gray and white stone pillars standing on both sides, and on the ceiling, there is also a long picture scroll, which seems to depict the creation of the goddess In the process of the world, the floor of the corridor is a black and white pattern composed of obsidian and marble, which looks like a chessboard.

The corridor was very long, shrouded in a layer of faint white mist, which became thicker and thicker in the distance, with no end in sight.

"It seems that this is another space?"

Rosen asked, he didn't know much about these wonderful gadgets of mages, but he vaguely felt that this corridor seemed to be somewhat different from the previous ones.

"I don't know, I can't feel the traces of magic power. If it is really some kind of weird space, then the mage who arranged this is at least above the level of peak silver."

Karen shook her head, indicating that she didn't know.

"But almost all mages have one thing in common."

"What is it?"

Rosen was curious about what all these mages had in common. He had not come into contact with many mages, but each one was full of personality, which really did not allow him to have an intuitive understanding of this group of people.

"That's confidence to the point of arrogance."

Kallen smiled and didn't think it was demeaning.

"Since the other party has set up this mechanism, it means that as long as we can break the trap, we will not encounter other magical attacks that exceed the norm. The mechanism here should only consider the power here."

She pointed to her head, which represented the power most respected by mages, the power of wisdom.

Indeed, Rosen encountered a similar trap at the mage observation post in Istar, the desert capital. As long as he can find a way to break it, it will be very simple. On the contrary, if he has no clue, it will be difficult to rely on brute force. breakthrough.

"In any case, let's take a walk and try."

Rosen said that there is no other way right now, even if they know that there is a trap ahead, they can only go forward.

However, after walking for a while, Rosen and the others did not encounter any extraordinary events.

There were no attacks from other monsters, and the three of them were not separated.

The only difference is that when looking back, the gate between Tranquility has long been submerged in the mist and disappeared.

The front is still shrouded in fog, and their perception can only reach within a dozen yards. Although there is no crisis for a while, everyone still maintains a high degree of tension and dare not relax.

But all they were left with was silence.

The thick fog can absorb even the sound, and the surrounding is silent. I don't know how long I have walked, and I still can't see the end.

"Wait, something seems wrong."

Rosen stopped in his tracks.

"I noticed that too."

Karen looked at the ceiling and continued.

"This corridor seems to have no end."

"what?"

Although Langton had been away for so long, although he secretly speculated, he was also a little surprised after being confirmed by Karen.

"An infinite corridor again?"

"Well, if the previous corridor was infinite in the horizontal space, then this corridor is infinite in the vertical sense, with no end in sight and no beginning."

Karen thought about it and said, looking at Rosen.

"Do you have any idea?"

"Why don't we make a mark first and continue to move forward."

Rosen said that this is the easiest way. If they are always in the loop, they will always return to the original place. Conversely, if they do not return to the original place, then this space is questionable.

According to Rosen, they made different marks on the walls along the way, but they continued to walk for about two quarters of an hour, but there were no marks around the corridor.

"Interesting."

Karen did not show panic, but said meaningfully, it can be seen that her competitive spirit has been aroused by this unknown person who set up the trap.

She raised her hand and used magic to draw something in mid-air. Rosen took a quick look and saw that it seemed to be some kind of calculation formula.

After a quarter of an hour, marked by Kallen's long sigh of relief, the movements of her hands finally stopped.

"I already know the secret here."

Rosen remained silent, but quietly waited for Karen's answer.

"It's actually very simple, the reason we can't get out here is because we haven't made a change to this corridor."

"Variety?"

Langton seemed to think of something, but he didn't speak rashly.

"That's right, if this corridor is a piece of music and our goal is to play it to the end, we haven't actually walked a single note before."

Karen explained, while drawing a string of musical notes in the air, which seemed to be the melody of an unknown piece of music.

"Wait, you mean, Siegel transform?"

Reacting immediately, when Langton said his guess, Kallen nodded.

"Well, yes, in fact, this corridor was quietly transformed by Siegel the moment we stepped in."

Kallen drew a cross in midair with a wavy line on it.

"It's a regular corridor, continuous, you can go to the end."

Then she waved her hand, and the wavy lines turned into vertical segments, lined up in a row, and gradually shortened.

"This is a corridor that has been transformed by Siegel. The continuity in space no longer exists, leaving only discreteness in frequency. In fact, the real corridor is made up of corridors in countless frequencies. compounded, and we are walking in one of these frequencies."

After listening to it for a long time, Rosen suddenly realized that this is the Fourier transform. He failed his high math once in his last university life, so he was deeply impressed.

This method of linking the two fields through functions did give Rosen a better understanding of the world, and of course, a deeper understanding of the difficulty of re-examinations.

"So, how do we get out of here."

He was not interested in listening to the headache math problem again, but asked directly about the final result.

"If you know the composition, it's very simple, just perform an inverse Siegel transformation on the space."

After all, Karen immediately wove several magic circles, and Rosen felt as if there was a buzzing sound in the air, and the surrounding fog immediately dissipated, and the weird feeling disappeared. behind them.

"As I said before, mages are all self-confident people, and I am no exception. For me, puzzles of this level are just a piece of cake."

Karen seemed to be a little proud to say, and then looked forward.

Indeed, a quaint door stands in front, waiting for people to open it.

But at the same time, between the three of them and the gate, there was another person.

His dark brown curly hair was tied into a ponytail at the back of his head. He wore a pair of broken glasses on his withered face. He was wearing a simple and worn robe. Only a thick book hung on his waist.

His eyes were hollow, glowing with deep flames, and his face was expressionless, as if he was waiting for Rosen and others to take action.

"Charles Collins."

Of course Rosen would not forget the name of the person who was fighting side by side with him just a moment ago.

This is Vivienne's Heroic Spirit, the existence with the rank of [Bard].

　In fact, students who don’t know the Fourier transform can just think of it as a certain mechanism that has been solved. There is no need to go into details. Speaking of which, regarding the Fourier transform, there is actually a very good analysis on Zhihu, but it is useless. A formula explains the meaning of this thing clearly. If any readers are struggling with this, you can check it out. It is quite helpful for understanding this magical thing.
　　
　
(End of this chapter)