The Exterior Covariant Derivative: Understanding Connections and Fibre Bundles

matness
Messages
90
Reaction score
0
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
 
Physics news on Phys.org
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.
 
Hello! There is a simple line in the textbook. If ##S## is a manifold, an injectively immersed submanifold ##M## of ##S## is embedded if and only if ##M## is locally closed in ##S##. Recall the definition. M is locally closed if for each point ##x\in M## there open ##U\subset S## such that ##M\cap U## is closed in ##U##. Embedding to injective immesion is simple. The opposite direction is hard. Suppose I have ##N## as source manifold and ##f:N\rightarrow S## is the injective...
Back
Top