Rapidly converging approximations and regularity theory

Details Rapidly converging approximations and regularity theory Rapidly converging approximations and regularity theory

2009-06-07

arxiv.org/abs/0906.1374v1

Mathematics

Analysis of PDEs

23 Pages

Scientific paper

We consider distributions on a closed compact manifold $M$ as maps on smoothing operators. Thus spaces of certain maps between $\Psi^{-\infty}(M)\to \mathcal{C}^{\infty}(M)$ are considered as generalized functions. For any collection of regularizing processes we produce an algebra of generalized functions and a diffeomorphism equivariant embedding of distributions into this algebra. We provide examples invariant under certain group actions. The regularity for such generalized functions is provided in terms of a certain tameness of maps between graded Frech\'et spaces. This notion of regularity implies the regularity in Colombeau algebras in the $\maG^{\infty}$ sense.

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