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- W2004707560 abstract "On a smooth compact manifold M, the cohomology of the complex of differential forms is isomorphic to the ordinary cohomology by the classical theorem of de Rham. When M has a Riemannian metric g, the harmonic forms constitute a subcomplex of the de Rham complex because the Laplacian commutes with exterior differentiation. When (M, g) has no boundary, all of its harmonic forms are closed, and hence the cohomology of this subcomplex is isomorphic to the ordinary cohomology by the classical theorem of Hodge. But when the boundary of (M, g) is non-empty, it is possible for a p-form to be harmonic without being closed, and some of these, which are exact, although not the exterior derivatives of harmonicp – 1-forms, represent an “echo” of the ordinary p – 1-dimensional cohomology within the p-dimensional harmonic cohomology." @default.
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- W2004707560 date "2006-01-20" @default.
- W2004707560 modified "2023-09-23" @default.
- W2004707560 title "Cohomology of harmonic forms on Riemannian manifolds with boundary" @default.
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- W2004707560 doi "https://doi.org/10.1515/forum.2006.046" @default.
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