Lexicon of Arguments

 Philosophical and Scientific Issues in Dispute
 
[german]


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Theses I
Theses II

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I 247
Measuring/Geometry/Feynman: there are properties that are independent of the particular type of measurement. For example, the distance between two points in a rotated coordinate system when one of the two points is in the origin.
The square of the distance is x² + y² + z².
What about space-time?

Space-Time/Geometry/Feynman: it is easy to show that there is also an invariance here:
I 248
The combination c²t² x² y² z² is the same before and after the transformation:

c²t' ² x' ² y' ² z' ² = c²t² x² y² z².

Ontology/Feynman: this quantity is something that like distance is "real" in a sense. It is called the Def "interval" between two space-time points.
>Space, >Time, >Space-time, >Space-time points, >Reality,
>Absoluteness, >Invariance.

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