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Closed and exact differential forms

In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0); and an exact form is a differential form, α, that is the exterior derivative of another differential form β, i.e. α = dβ. Thus, an exact form is in the image of d, and a closed form is in the kernel of d…

Applications, Examples in low dimensions & Application in electrodynamics

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Formulation as cohomology

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Closed and exact differential forms

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