If his calculations with 0/0 are mathematically valid,
why can't they be used in GR shit (in the case of
almost-flat-spacetime, of course)?

Le 15/02/2022 à 07:56, Maciej Wozniak a écrit :
> If his calculations with 0/0 are mathematically valid,
> why can't they be used in GR shit (in the case of
> almost-flat-spacetime, of course)?

We must avoid fiddling with infinitesimals or zeros without understanding
what we are doing.

A division by zero is possible, but should be avoided.

Take the case of the real speed of light (and not its observable speed).

Light moves instantly.

This means that Tr=0.

The speed of light over the distance x which separates A and B is
therefore Vr=x/0.

It's just.

But we must avoid writing that in the equations.

Idem for the problem which I posed this night and which consists in using
the infinitesimal ones. You can, but you have to be very careful what you
are doing.

Let's not forget that there are two proofs that the big shots themselves
collosalles blunders with this.

Newton first, with the surface increments, and the relativists, with their
erroneous calculations of the proper time of a rocket passing through
infinitesimal speed variations.

R.H.

On Tuesday, 15 February 2022 at 12:33:03 UTC+1, Richard Hachel wrote:
> Le 15/02/2022 à 07:56, Maciej Wozniak a écrit :
> > If his calculations with 0/0 are mathematically valid,
> > why can't they be used in GR shit (in the case of
> > almost-flat-spacetime, of course)?
> We must avoid fiddling with infinitesimals or zeros without understanding
> what we are doing.
>
> A division by zero is possible, but should be avoided.

Stupidity and incompetence is absolutely possible, indeed.
And it should be avoided, I agree.

On Monday, February 14, 2022 at 10:56:33 PM UTC-8, maluw...@gmail.com wrote:
> If his calculations with 0/0 are mathematically valid,
> why can't they be used in GR shit (in the case of
> almost-flat-spacetime, of course)?

Euh, don't confuse the meromorphic with the undefined.

Singularity theory and monodromy, basically make for well-defined
both the usually linearly invariant, the highly non-linear, and the
quasi-invariant, which work out for the Democritan, atomic, that
the 25 orders down atoms and 50 orders down superstrings, have
what results as parastatistics, in the milieu or the mesoscale, what
reflect the ensemble, for the centralizing and uniformizing, with also
a usual well-defined real wave equation and parallel transport, the
instanton/soliton/"totaliton", for the point/local/global/total, that is
basically simple to explain and easy to understand.

Consider reading the preface to Peeble's "Principles of Physical Cosmology",
then ignore the rest.

Ross A. Finlayson <ross.finlayson@gmail.com> wrote:
> On Monday, February 14, 2022 at 10:56:33 PM UTC-8, maluw...@gmail.com wrote:
>> If his calculations with 0/0 are mathematically valid,
>> why can't they be used in GR shit (in the case of
>> almost-flat-spacetime, of course)?
>
> Euh, don't confuse the meromorphic with the undefined.
>
> Singularity theory and monodromy, basically make for well-defined
> both the usually linearly invariant, the highly non-linear, and the
> quasi-invariant, which work out for the Democritan, atomic, that
> the 25 orders down atoms and 50 orders down superstrings, have
> what results as parastatistics, in the milieu or the mesoscale, what
> reflect the ensemble, for the centralizing and uniformizing, with also
> a usual well-defined real wave equation and parallel transport, the
> instanton/soliton/"totaliton", for the point/local/global/total, that is
> basically simple to explain and easy to understand.
>
> Consider reading the preface to Peeble's "Principles of Physical Cosmology",
> then ignore the rest.
>
>

I have Peebles’ book. Let me fetch it. What did you have in mind there?

--
Odd Bodkin -- maker of fine toys, tools, tables

On Wednesday, February 16, 2022 at 5:32:04 AM UTC-8, bodk...@gmail.com wrote:
> Ross A. Finlayson <ross.fi...@gmail.com> wrote:
> > On Monday, February 14, 2022 at 10:56:33 PM UTC-8, maluw...@gmail.com wrote:
> >> If his calculations with 0/0 are mathematically valid,
> >> why can't they be used in GR shit (in the case of
> >> almost-flat-spacetime, of course)?
> >
> > Euh, don't confuse the meromorphic with the undefined.
> >
> > Singularity theory and monodromy, basically make for well-defined
> > both the usually linearly invariant, the highly non-linear, and the
> > quasi-invariant, which work out for the Democritan, atomic, that
> > the 25 orders down atoms and 50 orders down superstrings, have
> > what results as parastatistics, in the milieu or the mesoscale, what
> > reflect the ensemble, for the centralizing and uniformizing, with also
> > a usual well-defined real wave equation and parallel transport, the
> > instanton/soliton/"totaliton", for the point/local/global/total, that is
> > basically simple to explain and easy to understand.
> >
> > Consider reading the preface to Peeble's "Principles of Physical Cosmology",
> > then ignore the rest.
> >
> >
> I have Peebles’ book. Let me fetch it. What did you have in mind there?
>
> --
> Odd Bodkin -- maker of fine toys, tools, tables

Steady State / Big Bang:
revisit Hubble.

Today we know that our local red-shifting what-was-the-limits
is beyond that pretty much isotropic, LaniaKea supercluster,
one big jet.

Peebles is pretty great.

How about a copy of "Physical Processes in the Interstellar Medium"?

The point is that Peeble's introduction, provides a grain of salt.

Ross A. Finlayson <ross.finlayson@gmail.com> wrote:
> On Wednesday, February 16, 2022 at 5:32:04 AM UTC-8, bodk...@gmail.com wrote:
>> Ross A. Finlayson <ross.fi...@gmail.com> wrote:
>>> On Monday, February 14, 2022 at 10:56:33 PM UTC-8, maluw...@gmail.com wrote:
>>>> If his calculations with 0/0 are mathematically valid,
>>>> why can't they be used in GR shit (in the case of
>>>> almost-flat-spacetime, of course)?
>>>
>>> Euh, don't confuse the meromorphic with the undefined.
>>>
>>> Singularity theory and monodromy, basically make for well-defined
>>> both the usually linearly invariant, the highly non-linear, and the
>>> quasi-invariant, which work out for the Democritan, atomic, that
>>> the 25 orders down atoms and 50 orders down superstrings, have
>>> what results as parastatistics, in the milieu or the mesoscale, what
>>> reflect the ensemble, for the centralizing and uniformizing, with also
>>> a usual well-defined real wave equation and parallel transport, the
>>> instanton/soliton/"totaliton", for the point/local/global/total, that is
>>> basically simple to explain and easy to understand.
>>>
>>> Consider reading the preface to Peeble's "Principles of Physical Cosmology",
>>> then ignore the rest.
>>>
>>>
>> I have Peebles’ book. Let me fetch it. What did you have in mind there?
>>
>> --
>> Odd Bodkin -- maker of fine toys, tools, tables
>
> Steady State / Big Bang:
> revisit Hubble.
>
> Today we know that our local red-shifting what-was-the-limits
> is beyond that pretty much isotropic, LaniaKea supercluster,
> one big jet.
>
> Peebles is pretty great.
>
> How about a copy of "Physical Processes in the Interstellar Medium"?
>
>
> The point is that Peeble's introduction, provides a grain of salt.
>
>
>
>

Grain of salt of what? Maybe you could cite what he said of particular
interest to you in that preface.

--
Odd Bodkin -- maker of fine toys, tools, tables