Relation between codifferential and boundary operator

In summary, the codifferential \delta is the adjoint of the exterior derivative and the boundary operator \partial is also the adjoint of the exterior derivative according to Stokes' theorem. The only relation between codifferential and boundary operator is exactly what is given in Stokes' theorem. However, there cannot be a direct formula between \partial and \delta as they are completely different things. It does not make sense to talk about "d" without \omega or \delta without \theta. Therefore, having B=Dual(A) and C=Dual(A) does not necessarily mean that B=C. The dual of an object is not always unique.
  • #1
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As we know,the codifferential [tex] \delta [/tex] is the adjoint of the exterior derivative,and the boundary operator [tex] \partial [/tex] is also the adjoint of exterior derivative according to stokes' theorem, then what is the relation between codifferential and boundary operator?
 
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  • #2
?? The only relation is exactly what you have given: Stoke's theorem.
 
  • #3
Stokes' theorem states that [tex] <D,d \omega >=<\partial D,\omega> [/tex] ([tex] \partial [/tex] is the boundary operator), exterior derivative d and codifferential [tex] \delta [/tex] hold the relation [tex] (\theta ,d \omega)=(\delta \theta ,\omega) [/tex],then could we form a formula between [tex] \partial [/tex] and [tex] \delta [/tex] directly?
 
  • #4
No, they are completely different things. In fact, it really does not make sense to talk about "d" without the [itex]\omega[/itex] or [itex]\delta[/itex] without the [itex]\theta[/itex].
 
  • #5
So B=Dual(A) and C=Dual(A) do not imply B=C, right? I once thought that the dual of one object must be unique, it is not true?
 

What is the relation between the codifferential and boundary operator?

The codifferential and boundary operator are both important mathematical tools used in differential geometry and topology. The codifferential operator is the adjoint of the exterior derivative operator, while the boundary operator is used to describe the boundary of a manifold or a chain. These operators are closely related and play a crucial role in various mathematical equations and proofs.

How do the codifferential and boundary operator interact with each other?

The codifferential and boundary operator are closely related and their interaction can be described by the Poincaré lemma. This lemma states that the cohomology of a closed manifold is isomorphic to the cohomology of its boundary. In other words, the codifferential operator maps closed forms to exact forms, and the boundary operator maps exact forms to closed forms.

What is the significance of the relation between the codifferential and boundary operator?

The relation between the codifferential and boundary operator is significant because it allows us to study the topology of a manifold by examining its boundary. This is useful in various fields of mathematics, such as differential geometry, algebraic topology, and mathematical physics.

What are some applications of the relation between the codifferential and boundary operator?

The relation between the codifferential and boundary operator has numerous applications in mathematics and physics. It is used to study the topology of manifolds, to prove theorems and equations in differential geometry, and to describe the behavior of physical systems in mathematical physics.

How can I learn more about the relation between the codifferential and boundary operator?

If you are interested in learning more about the relation between the codifferential and boundary operator, there are various resources available, such as textbooks, online courses, and research papers. It is recommended to have a solid understanding of differential geometry and topology before studying this topic in depth.

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