Re: Singularity within a Black Hole?

[Brent Meeker]

Sir Roger readily admits that there is no singularity, in spite of his theorem.  His theorem applies to GR without consideration of quantum mechanics.

Brent

On 2/23/2025 2:37 PM, Alan Grayson wrote:

It started with a question I had about the singularity within a BH which results from the  from the gravitational collapse of a massive star. If such a singularity exists, why don't the usual suspects voice any anxiety, as they do with the hypothetical singularity at the BB, when GR breaks down with density divervging?

Yes, I know; Roger Penrose received a Nobel Prize for answering this question in the affirmative. But then I wondered; how can such BH's exist in Nature when there is a breakdown of GR within them? I mean, if these singularities really exist, how can we affirm that the BH's related to them, exist? How could they exist without any blowback from the usual suspects? The answer is surprising; Penrose was wrong! Don't take my word for it. (First link below must be downloaded.)

https://www.researchgate.net/publication/375744216_Do_Black_Holes_have_Singularities 

https://bigthink.com/starts-with-a-bang/singularities-dont-exist-roy-kerr/

AG

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[Alan Grayson]

On Sunday, February 23, 2025 at 5:58:51 PM UTC-7 Brent Meeker wrote:

Sir Roger readily admits that there is no singularity, in spite of his theorem.  His theorem applies to GR without consideration of quantum mechanics.

Brent

There's no guarantee that a quantum theory of gravity will ever be developed. What then? AG 

[Brent Meeker]

On 2/23/2025 6:18 PM, Alan Grayson wrote:

On Sunday, February 23, 2025 at 5:58:51 PM UTC-7 Brent Meeker wrote:

Sir Roger readily admits that there is no singularity, in spite of his theorem.  His theorem applies to GR without consideration of quantum mechanics.

Brent

There's no guarantee that a quantum theory of gravity will ever be developed. What then? AG

We've done without one for 300,000yrs.  Life goes on.

Brent

[Alan Grayson]

I think we can role out a singularity without invoking quantum gravity. A singularity in the interior of a BH, would represent an inherent contradiction, and thus not be physically realizable. I speculate a repulsive fifth force of Nature that would prevent the contracting mass to achieve zero volume. AG

[Alan Grayson]

On Sunday, February 23, 2025 at 11:26:32 PM UTC-7 Alan Grayson wrote:

On Sunday, February 23, 2025 at 9:38:50 PM UTC-7 Brent Meeker wrote:

On 2/23/2025 6:18 PM, Alan Grayson wrote:

On Sunday, February 23, 2025 at 5:58:51 PM UTC-7 Brent Meeker wrote:

Sir Roger readily admits that there is no singularity, in spite of his theorem.  His theorem applies to GR without consideration of quantum mechanics.

Brent

There's no guarantee that a quantum theory of gravity will ever be developed. What then? AG

We've done without one for 300,000yrs.  Life goes on.

Brent

 

I think we can rule out a singularity without invoking quantum gravity. A singularity in the interior of a BH, would represent an inherent contradiction, and thus not be physically realizable. I speculate a repulsive fifth force of Nature that would prevent the contracting mass to achieve zero volume. AG

Brent; what do you think of my "proof" that a BH cannot have a singularity in its interior? If it did, it couldn't be physically real! AG 

[Brent Meeker]

I agree with it.  Physical things like curvature, can't be infinite. 

Brent

[Alan Grayson]

So, Penrose and Hawking left us twisting in the wind, while we wait for a quantum of theory of gravity, when the answer was in front of their respective noses. AG 

[Brent Meeker]

I'd say the question was in front of their noses.  We don't know the answer to how general relative merges with quantum mechanics.

Brent

[Alan Grayson]

You're too kind. Penrose and Hawking were addressing whether BH's have singularities, and they fell miserably short. AG