Yash

I read somewhere that a tesseract is to a cube what a cube is to a square. What exactly does that mean? Does this thing include a 4th dimension in some way?

Yeah, this is mostly out of my understanding... but it definitely sounds interesting

So I was just sitting one day when a sudden idea hit me. I have been wondering about it for some days now. We have always been taught that there were 3 dimensions in space. And then time was included as another dimension, creating the concept of SPACETIME. So the idea was that time is one dimension and space is another( not X, Y and Z). That gives us two dimensions. Now, forget about science for a moment. Consider a situation when you hear about something that has occurred, suppose an event where a mouse killed a lion (I know it's insane, but just think of it.). When you hear about it, what will be your response? I'll tell you. You will ask, "When did it happen? Where did it happen?". Now you probably get the idea of above mentioned two dimensions. These two questions give you a good idea of the event. Let's take this discussion ahead. Now suppose that you see a new kind of animal. Here is the question that most people will ask- "What is it?" There now, that question gives you the idea of the nature of event (You see, it actually tells you that it is not something that has OCCURRED. It is something that is just there. Confusing, I know it). To make it clear, take another situation, when your friend is depressed. You will probably ask, "What happened?", and your friend says, "I just broke up with my girlfriend.". Now that is an event that has occurred. Usual questions that follow are, "When did you break up? Why did you do so?" The second question tells you about the reason for the occurrence of event. That will be all I think. Coming back to our topic, we saw that anything that happens can be defined by some basic questions, "what, when, where, why and sometimes How." If we consider the answers of these as the DIMENSIONS of event, we can know about it in detail. A basic mechanics question can clear our doubts. A ball starts falling from a table top at, say, t=0. As it touches the ground, we can tell about the nature of event in some sentences- 1- What happened? --- A ball touches the ground. 2- when did it happen? -- At time 't'. (we can work that out using Newton's laws.) 3- where did it happen? -- the coordinates of place where the ball fell 4- why did it happen? -- probably due to a slight push on it towards the edge of table. 5- How did it happen -- by the action of gravity, the ball fell down and touched the ground. These answers give you a clear understanding of the event, This is not a theory, just an idea. I do not know how far this idea can get, if at all, or what will be the outcomes from it. But then, best things are the product of random ideas. Kindly reply to this and let me know what do you make of it. Thank You for reading.

just remember that limits are generally applied in the last step.

one of the famous theories(and controvesial too) says that the space is the same from where ever you look. So probably it has edges, but because edges look like another point INSIDE the universe, we can't explain where they are

try rationalisation

So I was just sitting one day when a sudden idea hit me. I have been wondering about it for some days now. We have always been taught that there were 3 dimensions in space. And then time was included as another dimension, creating the concept of SPACETIME. So the idea was that time is one dimension and space is another( not X, Y and Z). That gives us two dimensions. Now, forget about science for a moment. Consider a situation when you hear about something that has occurred, suppose an event where a mouse killed a lion (I know it's insane, but just think of it.). When you hear about it, what will be your response? I'll tell you. You will ask, "When did it happen? Where did it happen?". Now you probably get the idea of above mentioned two dimensions. These two questions give you a good idea of the event. Let's take this discussion ahead. Now suppose that you see a new kind of animal. Here is the question that most people will ask- "What is it?" There now, that question gives you the idea of the nature of event (You see, it actually tells you that it is not something that has OCCURRED. It is something that is just there. Confusing, I know it). To make it clear, take another situation, when your friend is depressed. You will probably ask, "What happened?", and your friend says, "I just broke up with my girlfriend.". Now that is an event that has occurred. Usual questions that follow are, "When did you break up? Why did you do so?" The second question tells you about the reason for the occurrence of event. That will be all I think. Coming back to our topic, we saw that anything that happens can be defined by some basic questions, "what, when, where, why and sometimes How." If we consider the answers of these as the DIMENSIONS of event, we can know about it in detail. A basic mechanics question can clear our doubts. A ball starts falling from a table top at, say, t=0. As it touches the ground, we can tell about the nature of event in some sentences- 1- What happened? --- A ball touches the ground. 2- when did it happen? -- At time 't'. (we can work that out using Newton's laws.) 3- where did it happen? -- the coordinates of place where the ball fell 4- why did it happen? -- probably due to a slight push on it towards the edge of table. 5- How did it happen -- by the action of gravity, the ball fell down and touched the ground. These answers give you a clear understanding of the event, This is not a theory, just an idea. I do not know how far this idea can get, if at all, or what will be the outcomes from it. But then, best things are the product of random ideas. Kindly reply to this and let me know what do you make of it. Thank You for reading.