Topological Aspects of Differential Chains

Details Topological Aspects of Differential Chains Topological Aspects of Differential Chains

2011-01-02

arxiv.org/abs/1101.0383v1

Journal of Geometric Analysis, 2011

Mathematics

Functional Analysis

6 pages

Scientific paper

In this paper we investigate the topological properties of the space of differential chains 'B(U) defined on an open subset U of a Riemannian manifold M. We show that 'B(U) is not generally reflexive, identifying a fundamental difference between currents and differential chains. We also give several new brief (though non-constructive) definitions of the space 'B(U), and prove that it is a separable ultrabornological (DF)-space. Differential chains are closed under dual versions of fundamental operators of the Cartan calculus on differential forms. The space has good properties some of which are not exhibited by currents B'(U) or D'(U). For example, chains supported in finitely many points are dense in 'B(U) for all open U in M, but not generally in the strong dual topology of B'(U).

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