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- W1498560348 abstract "UNIFORM algebras have been extensively investigated because of their importance in the theory of uniform approximation and as examples of complex Banach algebras. An interesting question is whether analogous algebras exist when a complete valued field other than the complex numbers is used as the underlying field of the algebra. In the Archimedean setting, this generalisation is given by the theory of real function algebras introduced by S. H. Kulkarni and B. V. Limaye in the 1980s. This thesis establishes a broader theory accommodating any complete valued field as the underlying field by involving Galois automorphisms and using non-Archimedean analysis. The approach taken keeps close to the original definitions from the Archimedean setting.Basic function algebras are defined and generalise real function algebras to all complete valued fields. Several examples are provided.Each basic function algebra is shown to have a lattice of basic extensions related to the field structure. In the non-Archimedean setting it is shown that certain basic function algebras have residue algebras that are also basic function algebras.A representation theorem is established. Commutative unital Banach F-algebras with square preserving norm and finite basic dimension are shown to be isometrically F-isomorphic to some subalgebra of a Basic function algebra.The theory of non-commutative real function algebras was established by K. Jarosz in 2008. The possibility of their generalisation to the non-Archimedean setting is established in this thesis.In the context of complex uniform algebras, a new proof is given using transfinite induction of the Feinstein-Heath Swiss cheese “Classicalisation” theorem." @default.
- W1498560348 created "2016-06-24" @default.
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- W1498560348 date "2012-03-15" @default.
- W1498560348 modified "2023-09-27" @default.
- W1498560348 title "Uniform Algebras Over Complete Valued Fields" @default.
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