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On Thu, 1 May 2025 3:26:30 +0000, Ross Finlayson wrote:Today we have a fundamental physics that's a bit more than>>
On 04/30/2025 12:44 PM, gharnagel wrote:>theories.
On Wed, 30 Apr 2025 14:18:34 +0000, Ross Finlayson wrote:>>
Mathematics _owes_ physics better mathematics of infinities
and singularities, because infinitesimals and multiplicities
are in effect in dynamics of continuous change.
There has been considerable interplay between mathematicians and
physicists. Mathematicians invented complex analysis and Laplace
transforms. which are used by physicists and engineers. The Euler
function had no practical use until physicists noticed that it
seemed to predict baryon masses, which then led to string theory
and brane theory.
>Singularity theories are just half-accounts of multiplicity>>
“as far as the laws of mathematics refer to reality, they are
not certain; and as far as they are certain, they do not refer
to reality” -- Albert Einstein
>When they asked Einstein "is the universe infinite" he said>
something along the lines of "it isn't not".
"Only two things are infinite, the universe and human stupidity,
and I'm not sure about the former." -- Albert Einstein
>It's pretty well agreed we're looking at a field theory>
and a gauge theory and over a continuous manifold,
I'm not sure about that. Those are mathematical models
of reality (see the first Einstein quote above).
>.....>
So, the "domain of applicability" here is "a physics",
Actually, it's a limit on a model. If you want a larger
domain, get a new model.
Well, there are a lot of empirical models.
I sort of think that's ALL we have.
>[Irrelevance deleted]>
>
So, before even getting into mathematical models and physical
models, and the mathematical interpretation and the physical
interpretation, and what's "real" as it's in the physical
interpretation, there's all of mathematical model theory
to figure out, or at least as with regards to continuity,
and here, infinity.
Data is real. Everything else is modeling (invention).
>[More irrelevance deleted]>There are a lot of empirical models: there's only one data.>
Amen. The useful models are, well, used. The others are dumped.
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