The problem of four dimensional space and limits, four dimensional space and five dimensional space

I don't think so. You see, if you reach that speed and fly towards the stars, the first thing you see is 200 years ago, an hour later it will be 180 years ago, and two hours later it will be 150 years ago (just make an assumption, I don't count). Because you are getting closer and closer to the stars, it doesn't mean that you have walked into it, but the light you see is still 200 years ago; The reason why you see the light 200 years ago is because you are 200 light-years away from it, and if you are 100 light-years away from it, you will see the stars from 100 years ago (and the light does not follow you).

So your thoughts are not directly related to your conclusions. But there may be so-called "wormholes" in the universe, and one step in it is equivalent to walking a hundred steps in ordinary space, that is, a different dimension of space that connects two plane spaces. But the pressure inside the wormhole is enormous, and any object will be twisted into powder in an instant.

Moreover, if you do reach the speed of light, time is equivalent to standing still for you, which has long been proven by the formula. It's good to have an idea, but don't get excited. Any major theorem is obtained by wise predecessors through complicated calculations and repeated deliberations and experiments.

I said earlier that it was just a hypothesis. Then I will change it to five years now, and the conclusion will not change.

And I'm your sister!!

Call sister!

Think about it this way, what if there were two clocks on Earth that were exactly synchronized 200 light-years?

Before you set off, you see that the clock over there shows the time 200 years ago, and you actually know that the time over there is actually the same as here, but it is too slow to see the "now" over there.

So you can't wait to use 400 times the speed of light to go over there and see the "now" over there, but it will take half a year for you to get there (200 light years and 400 times the speed of light), and when you get there, half a year has passed over there, not the "now" over there, let alone reach the past over there, and the clock over there will not be reversed because you are moving faster than the speed of light.

Even if you can teleport at infinite speeds, you can only get to that side "in no time", and you will see the same time as the clock time on that side, and you will not see the past on the other side. In other words, you can't beat time with speed, unless you use wormholes.

What's more, you see the past 200 years ago, but in the process of moving there, you will see that the scene over there is "developing rapidly", faster than normal, instead of "always changing" as you think, and when you arrive there, you see the future of that side, not the scene that you think was fixed 200 years ago.

Don't think about it. Tell the United States to throw out all the nuclear **. It is estimated that the power is strong enough, and there may be an unexpected scene.

The four-dimensional bai space is the addition of time du to the length, width and height, that is, if you are in the four-dimensional space, you can see the previous you and the future you.

Five-dimensional space refers to two intersecting timelines. It's two kinds of past lives that you can see, and two different future lives.

The six-dimensional space refers to the fact that you can travel between two timelines, go back to the past, and reach the future.

The seven-dimensional space is a myriad of timelines intersecting.

Eight-dimensional space refers to the intersection of countless timelines at countless points in time of two intersecting timelines.

Nine-dimensional space refers to the intersection of countless timelines at countless points in time after the intersection of countless timelines.

The so-called dimension is actually a concept in vectors, not really a spatial concept. In spatial geometry, the position of any point in space can be determined by using three orthogonal vectors (perpendicular to each other) starting from the origin, that is, the position of a point can be represented by three vectors, so it is called three-dimensional space. In image processing technology, the five-dimensional space is mentioned because any ** contains not only the plane coordinate vector, but also the color information of the pixel red, green, and blue values, that is to say, a point needs to be represented correctly with five vectors.

With this in mind, let's look at the so-called four-dimensional space.

Can the state of a point in space be fully represented by a three-dimensional spatial coordinate vector? Let's take a look at a simple example.

Yesterday there was a piece of paper on the table, and today I took this paper away. The state of this position of the paper on the table can be seen to be changing, so an additional time vector needs to be added to represent the state of this position. In this way, the state of any position in space at any time can be represented by four vectors, which is the four-dimensional space.

The proposal of four-dimensional space provides a thinking framework for human beings to travel through time and space, that is, whether someone in the present can return to a certain moment in the past or a certain time in the future. This requires the resolution of whether the timeline is a physical quantity that is not determined by time itself. For example, he is determined by a specific physical quantity, and the trajectory of time changes with the change of this physical quantity.

Then one can find the corresponding time node by selecting a specific value of this physical quantity, which is the so-called time travel. Movement in space is not called a problem. It's easy to say, but it's still unknown what the physical quantity that determines time, and whether it's a physical quantity or not, so time travel is still an unforeseeable future project.

I hope it will be useful to you and I wish you a happy study

1st floor. According to Du Niang's encyclopedia, the thinking space is a timeline t in addition to x, y, and z. Let's guess.

In two-dimensional space, the figure changes with the change of x, y, and in three-dimensional space, the shape of the object changes with the change of the value of the x, y, and z axes. Then in the four-dimensional space, in addition to the change with the change of x, y, z, the object also changes with the change of t, that is, time.

From the above conclusions, we can guess that man is four-dimensional, because man not only has three-dimensional characteristics, but also changes over time. So it can be summed up not only by people, but by any living being. On the other hand, inanimate objects do not change with time, except for external factors.

So any inanimate three-dimensional is three-dimensional. (For example, if you put a drop of water in a thermostatically sealed reservoir, it will always be water, no matter how long).

It's just a conjecture, and I hope you can point out the shortcomings.

Let me tell you first, there is actually no difference between the first and second types you are talking about. Remember this sentence first, and then I'll tell you later.

First, dimensions are mathematical concepts, and mathematics is the basic tool of all sciences. Physically, in the study of space-time unity, it is believed that space-time has four dimensions.

Second, there is no one, two, three, and four dimensions in space-time: length, width, height, and time, and there is no provision of who is the first dimension, and who is the second dimension、、、 as long as you calculate conveniently, you can set any of the dimensions as the first dimension、、、 just like there are four people in the room, there is no need to stipulate who is one and who is two... If you find it convenient, you can call the length, width, and height the first, two, and fourth dimensions, and the time the third dimension.

Third, time is precisely a dimension other than the three dimensions of length, width and height, so why is it called the fourth dimension? Because the space we are in is three-dimensional, we call the time dimension that cannot be seen and touched, but on which the whole three-dimensional space changes and integrates, the fourth dimension. In other words, it is not that the fourth dimension is time, but that time is measured in the fourth dimension.

If we are in two-dimensional space, time is the third dimension, if we are in four-dimensional space, time is the fifth dimension, and if we are in the nth dimension, time is the n+1st dimension. Again, just calling it that doesn't mean that the first dimension is time.

Fourth, you should also see that time is not special, that is, the units are different, it is a higher dimension, time and space are unified, and time and space should not be separated from space in modern physics. You have to remember this, otherwise it will be difficult for you to understand the problem of the speed of light.

Fifth, there are two kinds of things you said, one is the definition of dimensions in multivariate geometry, and the other is the application of physics, now you understand, there is no contradiction. In physics, for the study of the unity of four-dimensional space-time, the time dimension is the unknown direction dimension you mentioned. It's just that the unit of measurement is different.

Sixth, multivariate geometry describes a multidimensional space as an ideal model, and physics studies the actual situation. In reality, there is no absolute one-dimensional space, two-dimensional space, three-dimensional space、、、 there is no thin tube with a diameter of 0, and there is no absolutely smooth and dense wall. Physically, a dimension is small enough to have no impact on the computation, even if it is treated as none.

For example, if a hair is held very closely, we think of it as a three-dimensional cylinder, and if we hold it far away, we can approximate it as one-dimensional. In the same way, our three-dimensional space is not to say that there are no other dimensions, just because the curl is too small, it is treated as nothing.

Seventh, the time we experience is not necessarily one-dimensional in itself (inconclusive), but it can be measured in one dimension for now. It's just that some of the experimental results are still difficult to explain.

Eighth, to help you distinguish again, we apply the mathematical model to thermodynamics, to define that a quantitative gas should maintain equilibrium, temperature, pressure, volume three-dimensional, I can still establish three axes perpendicular to each other to depict the correlation function, related to time and space?

After reading this, you should understand, if you still don't understand, only modeling is an example.

As an added note, your question is misclassified.

Know the vector in mathematics, any pointing arrow in the infinite dimensional space, that is to say, the dimension is simply described by a string of (x1, x2 numbers, the physical operation law in this space is to obey the basic vector law, everything is a point, and the point, line and surface in your view is actually your experience, human beings rely on their limited senses to feel a part of the point, and use it to visualize, in order to reduce the load on the brain, you have not seen the four-dimensional space, your brain will never have this ganglion, Some prophets may have (very supernatural), and they know it when they have feelings, but it is useless to want to die if they don't feel it, which is the origin of the Tao and the Tao

Physically, it is understood as length, width, height and timeline, mathematically, it is a concept in geometry, and theoretically there can be n-dimensional space, which is in abstract geometry!