What is the Universe expanding into..

Do you think there was anything before the big bang?

  • I don't think there was anything before the Big Bang

    Votes: 56 12.5%
  • I think something existed before the Big Bang

    Votes: 200 44.7%
  • I don't think the big bang happened

    Votes: 54 12.1%
  • I think the universe is part of a mutiverse

    Votes: 201 45.0%

  • Total voters
    447
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According to my latest 4D Mathematical Theories on Time, we only Live in the present moment! 😀

https://en.wikipedia.org/wiki/Regular_4-polytope

Thus have got all my jobs done today. Garden watered. It's going very well, in fact!

I think I should win a Prize for this Scented Geranium.

IM000990.JPG



Still puzzling over General Relativity:

https://www.cnet.com/science/featur...d-time/?utm_source=pocket-newtab-global-en-GB
 
Thanks Steve: That's a really relevant article on General Relativity, in the sense that it links with the 4D discussion we've been having.

https://www.cnet.com/science/featur...d-time/?utm_source=pocket-newtab-global-en-GB

Even though Pac-Man is unable to perceive 3D space doesn't mean 3D space can't exist. We're living in it. In fact, he's living in it.

Likewise, though we are unable to perceive 4D space, we are still living in it.

"Everything regarding general relativity lives in 4D. Fortunately, even though we can't mentally picture the fourth dimension, we can mathematically calculate it."
 

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Even though Pac-Man is unable to perceive 3D space doesn't mean 3D space can't exist. We're living in it. In fact, he's living in it.

Likewise, though we are unable to perceive 4D space, we are still living in it.
Well, without the 4th dimension "Time" would we even be able to perceive? If we only had physical dimensions, how would we be able to exist with everything locked into stasis?
And I'd like to argue that Pac-Man is by definition 3D, two dimensions in which he can move, and time.
 
I am talking about the four-dimensional mathematical construction known as spacetime, in which time is treated as another dimension like space.

Go back to the tesseract and you might better understand what is meant by a 4D mathematical construction. Time is the fourth dimension of the spacetime manifold.

It is this fourth dimension that we can't mentally picture or perceive.
 
Time started out as a measure of one thing changing vs another thing changing. I suppose an absence of “time” is equivalent to an absence of relative change.

I’m just a caveman, though. I’m still struggling with whether imaginary numbers exist and are therefore real, and what implication that has for real numbers; are they really real numbers?
 
I am also unable to imagine space and matter existing without time, does not compute.

It is mathematically possible that there are universes where time without space exists, but their laws of physics would be unpredictable.

The time without space occupies the left hand column in the attached diagram.

So, your imagining is correct, we live in a universe where space and time (and matter) coexist along with our laws of physics.
 

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