Transformations of Basis Vectors on Manifolds

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SUMMARY

The discussion focuses on the transformation of basis vectors on manifolds, specifically demonstrating that the transformed basis vector \(\vec{e'}_a\) can be expressed as \(\vec{e'}_a = \frac{\partial x^b}{\partial x'^a} \vec{e}_b\). Participants clarify that the basis vectors \(\vec{e}_b\) correspond to the partial derivative operators \(\frac{\partial}{\partial x^b}\) and \(\vec{e'}_a\) to \(\frac{\partial}{\partial x'^a\). The transformation relies on the invariance of the differential element \(ds\) and the relationship between coordinate systems.

PREREQUISITES
  • Understanding of manifold theory and basis vectors
  • Familiarity with coordinate transformations
  • Knowledge of differential geometry concepts
  • Proficiency in using partial derivatives in mathematical expressions
NEXT STEPS
  • Study the properties of coordinate bases in differential geometry
  • Learn about the invariance of differential forms and their applications
  • Explore the concept of tangent vectors and their representations
  • Investigate the implications of coordinate transformations on vector fields
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Mathematicians, physicists, and students studying differential geometry, particularly those interested in the transformation properties of basis vectors on manifolds.

ehrenfest
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Homework Statement


I am trying to show that
[tex]\vec{e'}_a = \frac{\partial x^b}{\partial x'^a} \vec{e}_b[/tex]

where the e's are bases on a manifold and the primes mean a change of coordinates
I can get that [tex]\frac{\partial x^a}{ \partial x'^b} dx'^b \vec{e}_a = dx'^a \vec{e'}_a[/tex] from the invariance of ds but what should I do next?

Homework Equations


The Attempt at a Solution

 
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ehrenfest said:

Homework Statement


I am trying to show that
[tex]\vec{e'}_a = \frac{\partial x^b}{\partial x'^a} \vec{e}_b[/tex]

where the e's are bases on a manifold and the primes mean a change of coordinates

You're dealing with coodinates bases, or else your expression above isn't true. Thus

[tex]\vec{e}_b = \frac{\partial}{\partial x^b}[/tex]

[tex]\vec{e'}_a = \frac{\partial}{\partial x'^a}.[/tex]
 
George Jones said:
You're dealing with coodinates bases, or else your expression above isn't true. Thus

[tex]\vec{e}_b = \frac{\partial}{\partial x^b}[/tex]

[tex]\vec{e'}_a = \frac{\partial}{\partial x'^a}.[/tex]
Yes, I am dealing with coordinate bases.

How can you set a basis vector equal to a partial derivative operator?
 
Last edited:

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