The Exterior Covariant Derivative: Understanding Connections and Fibre Bundles

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SUMMARY

The discussion centers on the exterior covariant derivative and its relationship to connections and fibre bundles. A connection is defined as a bilinear connection that satisfies specific properties, crucial for understanding the covariant exterior derivative. The conversation highlights the importance of grasping the concept of connections over fibre bundles, particularly G-bundles, to fully comprehend the exterior covariant derivative. Additionally, the terms "horizontal" and "vertical" components are introduced as essential for understanding the decomposition of subspaces in fibre bundles, with Nakahara's book recommended as a resource.

PREREQUISITES
  • Understanding of connections on differentiable manifolds
  • Familiarity with fibre bundles, specifically G-bundles
  • Basic knowledge of p-forms in differential geometry
  • Awareness of decomposition techniques in vector spaces
NEXT STEPS
  • Study the definition and properties of connections on fibre bundles
  • Read Nakahara's book for an introduction to fibre bundles and connections
  • Explore the concept of covariant derivatives in the context of differential geometry
  • Investigate the application of exterior covariant derivatives in physics
USEFUL FOR

Mathematicians, physicists, and students of differential geometry seeking to deepen their understanding of connections, fibre bundles, and their applications in theoretical physics.

matness
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Can you give me the definition of exterior covariant derivative or any reference web page ?

Wiki does not involve enough info.I am not able to do calculation with respect to given definition there.

Thanks in advance
 
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The wikipedia article seems relatively complete to me. What specifically don't you understand about it?
 
Because the definition of connection in my mind is : "a bilinear connection satisfying certain properties."
I don't know what horizantal/ vertical component mean exactly.
what do "D" to a p-form for example?
I need a definition or explanation using indices at first, because i am trying to understand smt related to physics.
 
matness said:
Because the definition of connection in my mind is : "a bilinear connection satisfying certain properties."

Then it sounds as though you're familiar with the concept of a connection only within the context of a connection on a differentiable manifold. To understand the idea of a covariant exterior connection you'll need to understand the more general idea of a connection over a fibre bundle. It would, in my opinion, be a waste of time to attempt to do what you're asking without even a basic idea of what a connection over a fibre bundle is; to be more precise, you'll need to know what a connection over a G-bundle is in order to be able to appreciate the idea of a covariant exterior derivative.

By the way, the "horizontal" and "vertical" bits refer to a decomposition technique used when looking at subspaces over a fibre bundle. Nakahara's book has a decent introduction to this.
 

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