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Re: Annotated version of SRT

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Am 21.05.2022 um 00:10 schrieb JanPB:
> On Friday, May 20, 2022 at 12:17:48 AM UTC-7, Thomas Heger wrote:
>> Am 19.05.2022 um 11:05 schrieb JanPB:
>>> On Wednesday, May 18, 2022 at 11:39:30 PM UTC-7, Thomas Heger wrote:
>>>> Am 15.05.2022 um 04:29 schrieb JanPB:
>>>>>> But apparently you know how to derive Einstein's equation. So, please
>>>>>>> let me know, how that works.
>>>>> It's written out in the paper. Given the equation (1/2)*(tau_0 + tau_2) = tau_1,
>>>>> one differentiates it wrt x' and that yields the equation constraining the
>>>>> A and D constants.
>>>> Einstein did something VERY nasty:
>>>>
>>>> he reused the symbol tau for two different things.
>>>>
>>>> a) One is a time measure called tau
>>>>
>>>> b) another one is a function called tau.
>>>
>>> This is standard. Pick any math or physics textbook printed over last 100
>>> years and you'll see this sort of thing all over the place.
>> Well, no.
>> Bad habbits are still bad, even if they are common practice.
>
> This is not a bad habit, it's a very good, clean habit. It's a bit like a simpler
> version of the tensor index notation: letter choices reflect the meaning.
> But it does require that the reader learns how to write and read this sort of
> thing.
>
>> Here we have two different mathematical objects, which cannot be equated.
>
> Wrong.


???

In math we have a lot of different objects, that we can use to do 
something useful.

But any object belongs to a certain class of objects and you cannot 
equate objects from different classes.

One  minimal requirement for an equation is, that we have same types of 
objects on both sides of the equal-sign.

In physics we have the additional requirement, that we can only equate 
expressions, which have the same units.

To drop this requirement would allow to equate 1 mm with a shoe.


>> At least a discussion would be necessary, why the author thought, that a
>> time measure and a coordinate transformation should be equal.
>
> It's not necessary because your assumption is incorrect.
>
>>>> Now he used the time measure tau from a) in the equation (1/2)*(tau_0 +
>>>> tau_2) = tau_1
>>>>
>>>> But he used the function tau in the partial differential equation.
>>>>
>>>> That tau is a coordinate transformation in form of a function of
>>>> four-vectors, which produces transformed four vectors.
>
>>> The conclusion is the same as in the beginning: your annotations
>>> are a waste of time. They have nothing to do with mathematics
>>> or physics, they are silly fantasies.
>> No.
>>
>> My annotations are getting gradually better, while Einstein's text
>> remains crap forever.
>
> It's odd to see this kind of infantile delusion in an adult.


Well, I have a certain method to write a text.

This method incluses several versions, in which I eliminate errors and 
enhence the content.

This is kind of 'stepwise refinement', which I regard as a very good 
strategy.

I usually start with something rough, which outlines the topic.

Then I add details at random locations.

Then I bring the pieces into a certain order.

Then I eliminate errors and redo the process, but starting from the 
previous version.

This is an iterative process, which can produce very good results.

And its only this final product, what really counts, not the 
intermediate steps.

> No, your annotations are completely worthless. I wouldn't waste
> another minute on this sort of thing if I were you.
>
> Einstein's paper OTOH remains 100% correct forever.  And even if a new theory
> of everything appears on the scene, Eistein's, Maxwell's, Newton's, etc. theories
> will remain with us forever.
>

In my eyes that particular paper was the worst crap ever printed in science.

The overall concept and some parts related to relativity were actually 
correct. But the form was not.

In theoretical physics no errors are allowed and no deviation from the 
correct form.


TH

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Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-12 11:33 -0700
  Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-12 21:28 +0200
    Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-13 08:41 +0200
      Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-14 06:43 +0200
      Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-14 19:49 -0700
        Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-15 08:34 +0200
          Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-15 12:53 -0700
            Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-18 08:01 +0200
            Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-18 10:02 -0700
              Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-20 09:32 +0200
    Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-14 19:29 -0700
      Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-15 08:50 +0200
      Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-19 08:39 +0200
        Re: Annotated version of SRT Python <python@python.invalid> - 2022-05-19 11:03 +0200
          Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-05-19 06:56 -0700
        Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-19 02:05 -0700
          Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-20 09:17 +0200
            Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-05-20 15:10 -0700
              Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-21 08:38 +0200
            Re: Annotated version of SRT Python <python@python.invalid> - 2022-05-21 18:41 +0200
              Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-05-21 11:51 -0700
              Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-22 07:29 +0200
                Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-05-21 23:10 -0700
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-05-30 07:19 +0200
                Re: Annotated version of SRT Mikko <mikko.levanto@iki.fi> - 2022-05-31 12:08 +0300
        Re: Annotated version of SRT "Paul B. Andersen" <paul.b.andersen@paulba.no> - 2022-05-19 20:00 +0200

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