The Stable Rank of Topological Algebras and a Problem of R.G. Swan

Details The Stable Rank of Topological Algebras and a Problem of R.G. Swan The Stable Rank of Topological Algebras and a Problem of R.G. Swan

1998-06-26

arxiv.org/abs/math/9806145v1

Mathematics

Operator Algebras

AMS-LaTeX, 29 pages, submitted to J. Funct. Anal

Scientific paper

Various notions of stable ranks are studied for topological algebras. Some partial answers to R.G. Swan's problem (Have two Banach or good Fr\'echet algebras as in the density theorem in K-theory the same stable rank ?) are obtained. For example, a Fr\'echet dense $\ast$-subalgebra $A$ of a $C^\ast$-algebra $B$, closed under $C^\infty$-functional calculus of self-adjoint elements, has the same Bass stable rank as $B$.

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