Dimension Theory

Originally posted by @lemon-lime
3 seems to be the minimum requirement for actual physical existence.

But what do I know, it may only seem that way because I just happen to be a 3D entity residing in a 3D universe.

Actually our universe has at least four dimensions. Don't forget time.

Originally posted by @twhitehead
Actually our universe has at least four dimensions. Don't forget time.

Time (as well as space) is needed for the 3D objects inhabiting that space to move around. Time isn't a 3D physical object such as a planet, or a grain of sand, or a DVD disk recording of a physicist explaining the difference between space, the objects inhabiting that space, and time...

Originally posted by @lemon-lime
Time (as well as space) is needed for the 3D objects inhabiting that space to move around. Time isn't a 3D physical object such as a planet, or a grain of sand, or a DVD disk recording of a physicist explaining the difference between space, the objects inhabiting that space, and time...

Due to relativity, time and space are intertwined. Hence the phrase "spacetime." In special relativity, spacetime is a four-dimensional space known as a Minkowski space, wherein coordinate transformations are described by Lorentz transformations.

Originally posted by @kazetnagorra
Due to relativity, time and space are intertwined. Hence the phrase "spacetime." In special relativity, spacetime is a four-dimensional space known as a Minkowski space, wherein coordinate transformations are described by Lorentz transformations.

O_O

Watch out for his slider: dual carburetor flux capcitor.

In math, we have all the dimensions we need to make the numbers crunch. But in physical reality there are 3 dimensions only. Time is a dimension in math, but not in physical reality.

I realize that this attacks a deeply embedded myth, but maybe there is loot involved.

Originally posted by @apathist
In math, we have all the dimensions we need to make the numbers crunch. But in physical reality there are 3 dimensions only. Time is a dimension in math, but not in physical reality.

I realize that this attacks a deeply embedded myth, but maybe there is loot involved.

'Loot' is just 'tool' backward, so use as you feel comfortable.

Originally posted by @apathist
In math, we have all the dimensions we need to make the numbers crunch. But in physical reality there are 3 dimensions only. Time is a dimension in math, but not in physical reality.

I realize that this attacks a deeply embedded myth, but maybe there is loot involved.

We have to think about spacial dimensions, and temporal dimensions.
Time as being a temporal dimension exists in physical reality as it takes time to read this posting.

Originally posted by @lemon-lime
Time (as well as space) is needed for the 3D objects inhabiting that space to move around.

Exactly. Hence a forth dimension is required to specify where an object is.

Time isn't a 3D physical object such as a planet, or a grain of sand, or a DVD disk recording of a physicist explaining the difference between space, the objects inhabiting that space, and time...
Of course time isn't a 3D object. Nobody suggested it was. What a stupid thing to say.
Dimensions aren't 3D objects. You clearly haven't been paying attention. Dimensions are a way to measure things in relation to each other. In this case, they are a means to measure 4D objects.
A 3D object today is not identical to the same object tomorrow, so if you wish to specify exactly which object you are referring to, you need to include time ie four dimensions are the minimum required to absolutely specify such an object. We can go further and say that for a given particle, there are more dimensions such as charge and spin that are required to specify the particle, but usually we don't call properties with a limited number of values 'dimensions'. Spin has both magnitude and direction so may be more than one dimension.

Originally posted by @sonhouse
Which probes do you think are off course? We did really good at Pluto.

The Pioneer probes I believe.

Originally posted by @apathist
In math, we have all the dimensions we need to make the numbers crunch. But in physical reality there are 3 dimensions only. Time is a dimension in math, but not in physical reality.

I realize that this attacks a deeply embedded myth, but maybe there is loot involved.

I believe time springs from the true value of 3 being dependent on one's position in the universe. If there is not an absolute value of 3 then it can be said we only have a probability of having 3 of anything which gives the illusion of time.

Originally posted by @apathist
In math, we have all the dimensions we need to make the numbers crunch. But in physical reality there are 3 dimensions only. Time is a dimension in math, but not in physical reality.

I realize that this attacks a deeply embedded myth, but maybe there is loot involved.

That is incorrect. Due to relativity, time and space are intertwined. Hence the phrase "spacetime." In special relativity, spacetime is a four-dimensional space known as a Minkowski space, wherein coordinate transformations are described by Lorentz transformations.

Originally posted by @freakykbh
'Loot' is just 'tool' backward, so use as you feel comfortable.

I'm okay with that. You have no idea.

Originally posted by @fabianfnas
We have to think about spacial dimensions, and temporal dimensions.
Time as being a temporal dimension exists in physical reality as it takes time to read this posting.

Actually, only now exists. Past and future do not. Time is a math dimension, and not a physical reality dimension.

Originally posted by @twhitehead
Exactly. Hence a forth dimension is required to specify where an object is.

That isn't quite accurate. We do not need a time dimension to identify where an object is.

I know the myth is super-embedded for you.

Originally posted by @kazetnagorra
That is incorrect. Due to relativity, time and space are intertwined. Hence the phrase "spacetime." In special relativity, spacetime is a four-dimensional space known as a Minkowski space, wherein coordinate transformations are described by Lorentz transformations.

Spacetime is a math term. Minkowski space is a math term. Reality has three dimensions.

Reality is not math, I know that is hard to understand.