Re: What is "local time"?

Am Montag000014, 14.10.2024 um 18:49 schrieb The Starmaker:

Richard Hachel wrote:

>
What is "local time" in relativity?
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1. Is it the chronotropy of the local frame of reference?
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2. Is it the time noted on the watch of a given observer?
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This is obviously not AT ALL the same thing, and I suspect that many
physicists speak without knowing what they are talking about.
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Perhaps I could be more precise here.
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What are we talking about?
>
R.H.

 What we have here is a failure to communicate.
  Einstein spoke German.
 So his inglish is no too good.
 I'll give you an example:
  Design for a blouse
 Description
Oct. 27, 1936. A. EINSTEIN 1388- 101,756
BLOUSE Filed July 2, 1936 INVENTOR.
ATTORNEY.
  https://patents.google.com/patent/USD101756S/en

This patent contains a very strang error:
quotes
"ATENT OFFICE DESIGN FOR A BLOUSE Albert Einstein, New York, N. Y. Application July 2, 1936, Serial No. 63,612 "
"Be it known that I, Albert Einstein, a citizen of the German Republic, residing in the Borough of Manhattan, county of New York, and State of New York, have invented a new...."
BUT:
Germany wasn't a republic in 1936 and as far as I know, Einstein wasn't citizen of Germany at that time.
He renounced citizenship of the German Empire in 1896 and was from 1901 onwards citizen of Swizzerland.
Since Germany didn't allow dual citizenships in those days, he could not become a German again (and also remain Swiss).
He also left Germany some time before the advent of the nazis, even if he had been in Berlin until 1932.
Sometime is is said, that he was a citzen of Prussia.
But Germany had an undivided citizenship in those days and no citizenship from the states from which Germany was composed.
Germany was also not called 'German Republic' anymore in 1936, but 'Deutsches Reich' ('German Empire').
...