Coordinate Translation Vectors & Covectors

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SUMMARY

Coordinate transformations involving vectors and covectors utilize Jacobian Matrices, which are inverses of each other. In the case of simple translations, the Jacobian Matrix becomes trivial, providing no information about the extent of the translation. The equivalence principle asserts that all gauges yield the same results regardless of position or relative velocity, making it impossible to determine relative distances from identical experiments conducted at different locations. This discussion clarifies the distinction between coordinate translations and transformations of geometric objects at a single point.

PREREQUISITES
  • Understanding of Jacobian Matrices and their properties
  • Familiarity with the concepts of vectors and covectors
  • Knowledge of the equivalence principle in physics
  • Basic grasp of coordinate transformations
NEXT STEPS
  • Study the properties of Jacobian Matrices in depth
  • Explore the implications of the equivalence principle in various physical contexts
  • Learn about different types of coordinate transformations beyond simple translations
  • Investigate the mathematical representation of vectors and covectors in differential geometry
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Physicists, mathematicians, and students studying differential geometry or general relativity, particularly those interested in the behavior of vectors and covectors under coordinate transformations.

Shadumu
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Vectors and covectors transform differently with Jacobian Matrices inverse of each other. However, what is the general coordinate transformation is a simple translation of coordinates, the Jacobian Matrix will be trivially a delta and contains no information of how much the translation is. How to describe such a translation of coordinates properly?
 
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Shadumu said:
Vectors and covectors transform differently with Jacobian Matrices inverse of each other. However, what is the general coordinate transformation is a simple translation of coordinates, the Jacobian Matrix will be trivially a delta and contains no information of how much the translation is. How to describe such a translation of coordinates properly?
What do you mean by "properly". You have a definition of transformation (for example x'=x+a etc.). The fact that jacobian of the transformation is same for all translations is coming from equivalence principle (all gauges have same result independently of position or relative velocity). If I understand in good way, would you like to find out exact translation of coordinates of transformation from Jacobian? It is impossible and equivalence principle says it is generally imposible from same experiment on two different places find out their relative distance.
 
Shadumu said:
Vectors and covectors transform differently with Jacobian Matrices inverse of each other.

More precisely: vectors and covectors at a given point transform with Jacobians the inverse of each other.

Shadumu said:
what is the general coordinate transformation is a simple translation of coordinates

A translation of coordinates is a different kind of transformation than the kind referred to above: it involves moving from one point to another, not transforming geometric objects at a single point.
 

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