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math.DG2003
A geometric theory of harmonic and semi-conformal maps
Anders Kock
We describe for any Riemannian manifold a certain infinitesimal neighbourhood of the diagonal. Semi-conformal maps are analyzed as those that preserve such neighbourhoods; harmonic…
math.DG2002★ 4 cited
First neighbourhood of the diagonal, and geometric distributions
Anders Kock
We describe the geometric notion of distribution in synthetic terms, utilizing the notion of "first neighbourhood of the diagonal" from algebraic geometry. We characterize involuti…