Infinity

[Atlan0001]

In the thread "From a drop of water...." I mentioned the other to time being the fourth dimension of space . . . space being the fourth dimension of time (three dimensions of time, one of space).

I didn't catch the originating article but a generalized version of the scientific article is out where physicist researchers are now working with this same other to Einstein's Special Relativity spacetime geometry. How the superluminal can exist without really being superluminal thanks to a multi-dimensionality of time, something I've long been dealing in in my posts.

 

[Atlan0001]

I should say, using that multi-dimensionality of time geometry, how the superluminal can exist without really being superluminal, a multi-dimensionality I've long been dealing in in my posts.

 

[Catastrophe]

Gibsense,

When you play serious chess, like I did, at County, or even serious club, levels, you have to write down all your moves. You have time limits like 30 moves per hour. There are special clocks, which are two clocks stuck together. You make a move and hit your clock, and it stops and the other clock starts.
Writing down moves is easy. e2-e4, or P-K4. Along is abcdefgh, across is 12345678. So a2-a3.

So, to answer the question, there are no infinities in chess!


Cat )

 

[Ignat]

Can you multiply infinity by 2?

At least for 3! It's going to be endless anyway.

 

[Catastrophe]

Infinity is not a number.

Cat

 

[stanwaterman]

Is infinity unreal? We talk about infinite space or an infinite number of real numbers between 0 and 1 a sort of endless division by 2 or whatever. But I wonder how real Infinite actually is.

• Take an infinite line and join the ends. Is it a finite circle? Or is it an infinitely expanding circle?
• How about the real numbers between 0 and 1. If you integrate from 0 to 1 you get 1. Is that like joining the ends?
• And, even if the universe is closed (as opposed to an infinite flat Euclidian one) can it expand infinitely?

It seems as if there is a resolution (like joining the ends) but more profound. As if there is something more fundamental than 'joining the ends'
I cannot crack it. Anyone?

An infinite line has no ends to be joined!
If you add all the numbers between 0 and 1, which you can't because there is an infinity of them, they would add to infinity, if you could add them!
Don't know what you mean by a 'closed' universe. We can be pretty sure that our universe is finite as it only started a bit over 13bn years ago and it has trillions of years to go, we are in a very early stage.
We don't know what is 'outside' our universe, or if there is an 'outside'!

 

[stanwaterman]

At least for 3! It's going to be endless anyway.

Yes you can because there is an infinite number of different infinities!

 

[stanwaterman]

Yes you can because there is an infinite number of different infinities!

 

[Catastrophe]

An infinite line has no ends to be joined!
If you add all the numbers between 0 and 1, which you can't because there is an infinity of them, they would add to infinity, if you could add them!
Don't know what you mean by a 'closed' universe. We can be pretty sure that our universe is finite as it only started a bit over 13bn years ago and it has trillions of years to go, we are in a very early stage.
We don't know what is 'outside' our universe, or if there is an 'outside'!

We can be pretty sure that our universe is finite

A (D + 1) knows that. A (D) can only guess.

Cat

 

[Gibsense]

If you add all the numbers between 0 and 1, which you can't because there is an infinity of them, they would add to infinity, if you could add them!

Not true. You are wrong unless you have taken a bread loaf divided into an infinite number of pieces and fed an infinite number of mouths. Or maybe you have.

 

[Gibsense]

Don't know what you mean by a 'closed' universe. We can be pretty sure that our universe is finite as it only started a bit over 13bn years ago and it has trillions of years to go, we are in a very early stage.

The idea of a "closed universe" is like imagining the universe as a giant loop where you'd eventually end up where you started if you travelled far enough like a sphere surface. The debate about whether the universe is finite or infinite is still open, and it's tied to its shape. Some agree on a finite universe because of the Big Bang theory, while others think it could be infinite and flat. It's a big issue in cosmology that keeps scientists employed

 

[Gibsense]

At least for 3! It's going to be endless anyway.

I don't think infinity exists.
If we think about 4D topology, mathematicians - for example - state that 3D links in a chain can be pulled apart without breakage and that 3D knots are no longer knotted in 4 spatial dimensions. What is non-sensical in our 3D is reconciled in 4D or higher dimensions.
In 4D, things we find impossible in 3D, like untying knots without breaking them, can actually happen. So, while infinity might feel abstract and hard to grasp, in a higher-dimensional reality logic is satisfied (and infinity is unreal). Maybe

Cat's D+