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Results tagged with dg.differential-geometry
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user 11366
Complex, contact, Riemannian, pseudo-Riemannian and Finsler geometry, relativity, gauge theory, global analysis.
-6
votes
Why are differential forms called closed and exact?
Well, the notion of exactness lies in an algebraic background. Given a sequence of groups or R-Modules and morphisms given by arrows in the following way:
... -> A_n --f_n--> A_n+1 --f_n+1--> A_n+2 - …
- 1