In Charge of Heaven

In the ancient ruins of Qingshan Temple in Fanyu Village, Ji Haotian chatted with three men for a while, then flew out of Qingshan Temple Valley, and came to Shuangshan Jiangu, another valley in Fanyu Village.

Shuangshan Jiangu is the largest and deepest valley in Fanyu Village. It is located at the foot of Shuangshanjian, the highest peak of Fanyu Mountain, so it is called Shuangshanjian Valley, or Shuangshanjian for short.

Ji Haotian stood at the foot of Shuangshan Peak, the highest peak of Fanyu Mountain in Fanyu Village, looking around.

Not long after, a man of yellow race in a blue robe flew out of the forest at the top of the two mountains, and landed in front of Ji Haotian at the foot of the mountain.

What surprised Ji Haotian was that there were many rare and rare spatial dimension god crystals in the multiverse in this person's body. Obviously, this person had quite an adventure.

The spatial dimension god crystal was born in a high-level spatial dimension energy field, which is quite rare. Ji Haotian only had a few dozen yuan, far less than this blue-robed man. He could see that this blue-robed man had gone to a high-level This adventure is only possible in the spatial dimension.

Space dimension: each dimension is an insignificant section of a higher dimension. If the multiverse of the four-dimensional world is divided into endless three-dimensional spaces according to certain laws, then each of these three-dimensional spaces is a closed space The structures are all an independent three-dimensional multiverse. Countless legendary stories are staged in the small "three-dimensional film" in the eyes of these four-dimensional creatures, and then countless civilizations have created their own epics in these "films".

Although the four-dimensional world is filled by the three-dimensional world, the matter in the four-dimensional multiverse and the matter in the three-dimensional multiverse are independent systems that do not interfere with each other, and they are spaces that overlap and can exist at the same time. And the relationship between the four-dimensional world and the five-dimensional world is just like the three-dimensional and four-dimensional world... and so on to infinitely higher dimensions. The multiverses and various realms mentioned above belong to the three-dimensional space, and the three-dimensional worlds outside the multiverse are in the interlayers between different three-dimensional multiverses (these interlayers are also contained by the four-dimensional space occupied by the four-dimensional multiverse. , and it is just another form of "three-dimensional film" for four-dimensional space).

For a living body living in a two-dimensional space, a three-dimensional space is a whole formed by superimposing infinite layers of two-dimensional spaces. The two-dimensional world has always existed in the three-dimensional world, but the latter has one more coordinate axis than the former. If you make a two-dimensional creature move along that coordinate axis, that is, let it move in a direction that does not exist in the two-dimensional world, then to it, it just shuttles in infinite planes, and travels in countless two-dimensional worlds. It’s just a flash in the three-dimensional world, and it can’t let it see the whole picture of the three-dimensional world (if it observes a three-dimensional object, then what it sees is only the edge of an infinitely thin section of that object), although it is also in the In the three-dimensional world. Why is the relationship between three-dimensional creatures and the four-dimensional world not like this? The so-called "going from three-dimensional space to four-dimensional space" is just moving towards a direction that exists in four-dimensional space but not in three-dimensional space, and then crosses countless four-dimensional space sections (three-dimensional space).

Sometimes, human beings use pieces of paper as a metaphor for two-dimensional space, and compare the three-dimensional figure formed by stacking these pieces of paper into three-dimensional space, and then use the relationship between two-dimensional and three-dimensional to compare the relationship between three-dimensional and four-dimensional relation. What is the three-dimensional imagined by a two-dimensional creature? Maybe it will also use analogy to compare the lower dimension with its own dimension, and roughly understand the concept of "three-dimensional", but its two-dimensional brain has a stereoscopic image that cannot present a three-dimensional object (in fact In fact, what our three-dimensional brain presents is just a flat image, and the images in paintings and photos can also be understood as two-dimensional images, but it creates a three-dimensional sense of space in terms of visual effects.

The world in the eyes of two-dimensional creatures is a straight line connected by one-dimensional line segments, and these line segments are actually the edge parts of different plane figures. What they see is only the edges of those two-dimensional objects, just like what they see when observing the thickness of a film, except that the thickness of the objects in that world is zero, and for two-dimensional creatures, they are all entities. In the real sense, it is creatures in the four-dimensional world who can see "three-dimensional images". Every angle, every position, and every layer of the structure of the three-dimensional figure from the inside to the outside, all of which are completely exposed without any shelter under the gaze of the four-dimensional creatures, while the three-dimensional creatures can only see the surface of the opaque three-dimensional object ).

Make a straight line perpendicular to it on the two-dimensional plane, and then place a plane penetrated by the straight line at each point of the straight line. The whole composed of countless planes is the three-dimensional space. Although some two-dimensional creatures understand that the three-dimensional world is actually the product of the superposition of the two-dimensional world, all they can do is imagine many scattered plane figures, and then piece them together into a larger two-dimensional figure, and they cannot break through Its own level is superimposed on the two-dimensional direction in the three-dimensional direction. The same is true between three-dimensional creatures and the higher-dimensional world. Human beings cannot draw specific images of four-dimensional objects through various methods, and can only use analogies to help them roughly understand.