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NNTP-Posting-Date: Wed, 04 Sep 2024 17:10:14 +0000
Subject: Re: What is "present time" in physics?
Newsgroups: sci.physics.relativity
References: <Ui5QIab4-uknPHltT14hSGMQfrA@jntp>
From: Ross Finlayson <ross.a.finlayson@gmail.com>
Date: Wed, 4 Sep 2024 10:10:08 -0700
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On 09/04/2024 08:10 AM, Richard Hachel wrote:
> The problem of relativity is the understanding of the notion of present
> time, that is to say the notion of simultaneity (which should not be
> confused with the notion of chronotropy).
> Is there on the planet Fomalhaut IV, a princess Alexandra who lives
> there, at the same time as me; me who is here on earth?
> That is to say in the same present moment?
> It must be said that yes, since whatever procedure of universal
> synchronization I adopt, whether mine or that of Albert Einstein, there
> is necessarily a LABEL, and only one, to characterize the existence of
> Alexandra simultaneous with mine.
> But according to the method of "synchronization of present time", we
> will not have the same label.
> Einstein uses procedure M, Hachel procedure H.
> Procedure M is the most practical, procedure H is the most true.
> Procedure M is the most practical, because it derives from the
> synchronization of the present time on a point M placed very far away in
> an imaginary fourth dimension, and at an equal distance from all the
> points constituting our universe. This gives an abstract universal time,
> but very useful, where the notion of universal present time is flat, and
> reciprocal. If A exists at the same time as B for M, then B exists at
> the same time as A for M. It is very practical.
> Procedure H proposed by Richard Hachel is less practical, but truer. It
> is less practical, because the notion of symmetry of the present time
> will not be absolute. But it is truer, physically more accurate, and
> more beautiful. It will remain eternally true experimentally, and
> eternally more beautiful philosophically. What could be more beautiful
> than saying to a child: "This horse in this meadow, this moon in the
> sky, this galaxy in this telescope, you see them instantly, as they are
> today, live-live".
> What is uglier than human thought, which thinks it is intelligent,
> even though it is full of stupid mockery, conceptual imbecilities,
> simply because it can say, as all morons say: "The speed of light is c,
> we know it, we have measured it, experimented with it, and we get
> 3.10^8m/s".
> This is the most stupid reflection in the history of humanity, proposed
> by mocking morons (Python, John Baez) who think they are funny and
> intelligent, authorized mockers, but who have not understood anything
> about the notion of universal anisochrony and the two possible ways in
> which we can (or even MUST be able to) synchronize the clocks of the
> universe.
>
> R.H.

The (physical) space-time is a (mathematical) coordinate space, and
the (physical) Space-Time is the continuous manifold of the field number
formalism of QM combined with the inertial-systems'
differential-system GR, where according to Einstein the GR is
a differential-system parameterized by a "the time", and in
QM the time-reversibility has never been falsified, with the
time-ordering of the path-integral being pretty much classical,
a "clock hypothesis" is not un-usual, that with respect to a
coordinate space, yet there's only a forward-pointing ray of time,
between zero and one a vector field over the entirety of Space-Time,
that in deep space in absolute vacuum at absolute zero equals one.

Clocks either slow or meet, ....

That "there are no closed time-like curves" and "time reversibility
has never been falsified" then as with regards to null geodesics
and any usual ideas about using the time-like as simply an extra
"Fourth Dimension" for only mathematical extrapolation, has that
physically it might as well just be considered "the gradient" as
with regards to "t" everywhere universally parameterizing the
differential-system and time-ordering of GR and QM.

This sort of theory can for example reduce functional freedom
from 10^120 to approximately 1, while that "time dilation plus
length contraction equals space contraction" is simply enough
as of the FitzGeraldian and associated considerations of the
Heaviside and Larmour with respect to Lorentz, while in QM
there are both low-energy and high-energy supersymmetry, as
whether "virtual" particles are just another model of continuum
dynamics.

I.e., all one theory, all one manifold, all one t.

The d'Espagnat on a model philosopher's model physicist's
model philosophy's model physics, "objective realism",
with Broglie-Bohm and Aspect-like extra-locality, as
with regards to "anti-realist model physics", helps
explore then why making for a clock hypothesis and
a "the time" as Einstein does in "Out of My Later Years",
why curved space-time is just a model in the Cartesian
for "space contraction" then that though its consideration
as a "Fourth Dimension" asks a bit much of a simple numerical
resource of a mathematical/physical continuum, continuous
manifold.


What time is now?