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A comment on The Relation Between Mathematics and Physics by Paul Dirac. Parent comment

Re:The Relation Between Mathematics and Physics by Paul Dirac by rramadass on Thursday September 17, 2026 @06:17AM (#49738662)
Just to clarify; The term "2 x 109" is actually "2 x 10^9" or 2 billion years which was considered the present epoch i.e. accepted age of the universe at that time.

Dirac large numbers hypothesis - https://en.wikipedia.org/wiki/Dirac_large_numbers_hypothesis

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Re:The Relation Between Mathematics and Physics by Paul Dirac by DonaldFisk on Thursday September 17, 2026 @06:55AM (#49738971)
Correct (but now we know it should be somewhat higher than that), and 1039 should be 10^39, one of Dirac's Large Numbers, the size of the observable universe in atomic units, and also the ratio of electromagnetic to gravitational forces in the hydrogen atom.
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Re:The Relation Between Mathematics and Physics by Paul Dirac by rramadass on Thursday September 17, 2026 @07:28AM (#49739237)
Right. Added the wikipedia link to Dirac's LNH above.

Also found this; The fundamental constants and their variation: observational status and theoretical motivations - https://arxiv.org/abs/hep-ph/0205340

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