A general method for constructing essential uniform algebras
@article{Feinstein2015AGM, title={A general method for constructing essential uniform algebras}, author={Joel F. Feinstein and Alexander J. Izzo}, journal={Studia Mathematica}, year={2015} }
A general method for constructing essential uniform algebras with prescribed properties is presented. Using the method, the following examples are constructed: an essential, natural, regular uniform algebra on the closed unit disc; an essential, natural counterexample to the peak point conjecture on each manifold of dimension at least three; and an essential, natural uniform algebra on the unit sphere in C^3 containing the ball algebra and invariant under the action of the 3-torus. These…
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32 References
A Peak Point Theorem for Uniform Algebras Generated by Smooth Functions on Two‐Manifolds
- Mathematics
- 2001
We establish the peak point conjecture for uniform algebras generated by smooth functions on two‐manifolds: if A is a uniform algebra generated by smooth functions on a compact smooth two‐manifold M,…
Uniform algebras on the sphere invariant under group actions
- Mathematics
- 2009
It is shown under certain conditions that a uniform algebra on the unit sphere S in C2 that is invariant under the action of the 2-torus must be C(S). Contrasting with this, an example is presented…
Partial regularity and t-analytic sets for Banach function algebras
- Mathematics
- 2012
In this note we introduce the notion of t-analytic sets. Using this concept, we construct a class of closed prime ideals in Banach function algebras and discuss some problems related to Alling’s…
Polynomial approximation on three-dimensional real-analytic submanifolds of ⁿ
- Mathematics
- 2001
It was once conjectured that if A is a uniform algebra on its maximal ideal space X and if each point of X is a peak point for A, then A = C(X). This peak point conjecture was disproved by Brian Cole…
Uniform Algebras
- Mathematics
- 2000
Given a variety of algebras V, we study categories of algebras in V with a compatible structure of uniform space. The lattice of compatible uniformities of an algebra, Unif A, can be considered a…
Banach algebras and automatic continuity
- Mathematics
- 2000
Banach algebras combine algebraic and analytical aspects: it is the interplay of these structures that gives the subject its fascination. This volume expounds the general theory of Banach algebras,…
A peak point theorem for uniform algebras on real-analytic varieties
- Mathematics
- 2015
It was once conjectured that if $$A$$A is a uniform algebra on its maximal ideal space $$X$$X, and if each point of $$X$$X is a peak point for $$A$$A, then $$A = C(X)$$A=C(X). This peak-point…
POLYNOMIAL APPROXIMATION ON REAL-ANALYTIC VARIETIES IN C
- Mathematics
- 2004
We prove: Let Σ be a compact real-analytic variety in Cn. Assume (i) Σ is polynomially convex and (ii) every point of Σ is a peak point for P (Σ). Then P (Σ) = C(Σ). This generalizes a previous…
Swiss cheeses, rational approximation and universal plane curves
- Mathematics
- 2010
In this paper we consider the compact plane sets known as Swiss cheese sets, which are a useful source of examples in the theory of uniform algebras and rational approximation. We introduce a notion…