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Where does idea of infinite size of universe come from?


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On 23/05/2019 at 03:51, vlaiv said:

Just yesterday I was reading sort of "renormalization for dummies" kind of text - and while it is still out of my grasp, it did provide insight into similar understanding - we try different "hacks" to circumvent problems that arise from usage of math and concepts of infinities - because inherently underlying world does not work with infinities.

 

Even after renormalization in a renormalizable quantum field theory, most calculations of {what should be) physical quantities still yield infinity.

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I've always treated infinity as an abstraction. To my understanding it does not exist in the physical world rather it's an annoyance that turns up in our equations when we have a less than complete un

You in fact have a infinite number of trials by virtue of infinite spatial extent. We will have infinite number of "observable spheres" that evolved from same big bang, and if we assume homogeneity, a

Ssssh , I think it's listening Olly.     Jim 

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5 minutes ago, George Jones said:

 

Even after renormalization in a renormalizable quantum field theory, most calculations of {what should be) physical quantities still yield infinity.

That is no doubt very useful :D

 

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9 hours ago, andrew s said:

Oh course @saac you have at this very moment an infinity of masses depending on the velocity of the reference frame you measure it in with relative velocity v where |v| < c 😱

Regards Andrew 

You have just blown my mind with that Andrew :)  I am now gripping my chair for dear life as I contemplate hurtling through the universe with my infinity of masses at break neck speed :)  May explain why I'm finding it so difficult to lose some weight ;  is that the ultimate delusional excuse "I'm over weight because of my chosen reference frame" .   I like it. :) 

 

Jim 

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I've never liked the idea of infinity but I'm not a mathematician. Then again, I've never liked the idea that what I like or don't like will be of great interest to the universe...

:Dlly

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8 minutes ago, ollypenrice said:

I've never liked the idea of infinity but I'm not a mathematician. Then again, I've never liked the idea that what I like or don't like will be of great interest to the universe...

:Dlly

Ssssh , I think it's listening Olly. :) 

 

Jim 

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