On the bidual of quasinormable Fréchet algebras
Abstract
It is known that the bidual of a quasinormable Fréchet space E with local Banach spaces \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$(E_n)_{n\in {\mathbb N}}$\end{document} is topologically isomorphic to the inverse limit of \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\big (E_n^{\prime \prime }\big )_{n\in {\mathbb N}}$\end{document}
. With the aid of the Arens product and by homological means, we prove that the previous result is equally valid for quasinormable Fréchet m-convex algebras. This allows showing that the bidual of a σ-C*-algebra equipped with the Arens product is a σ-C*-algebra and presenting a new direct proof of a result on acyclic spectra due to Palamodov.