Sheaves of nonlinear generalized functions and manifold-valued distributions

Details Sheaves of nonlinear generalized functions and manifold-valued distributions Sheaves of nonlinear generalized functions and manifold-valued distributions

2006-09-13

arxiv.org/abs/math/0609358v2

Trans. Amer. Math. Soc. 361, 5177-5192, 2009

Mathematics

Functional Analysis

Minor changes, final version

Scientific paper

This paper is part of an ongoing program to develop a theory of generalized differential geometry. We consider the space $\mathcal{G}[X,Y]$ of Colombeau generalized functions defined on a manifold $X$ and taking values in a manifold $Y$. This space is essential in order to study concepts such as flows of generalized vector fields or geodesics of generalized metrics. We introduce an embedding of the space of continuous mappings $\mathcal{C}(X,Y)$ into $\mathcal{G}[X,Y]$ and study the sheaf properties of $\mathcal{G}[X,Y]$. Similar results are obtained for spaces of generalized vector bundle homomorphisms. Based on these constructions we propose the definition of a space $\mathcal{D}'[X,Y]$ of distributions on $X$ taking values in $Y$. $\mathcal{D}'[X,Y]$ is realized as a quotient of a certain subspace of $\mathcal{G}[X,Y]$.

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