Perturbations of the StoneȔWeierstrass Theorem
Part of the Graduate Texts in Mathematics book series (GTM, volume 35)
Let D be the closed unit disk in ℂ. Given functions f, g on D, we denote by [f, g] the algebra of all functions P(f, g) on D, where P is a polynomial in two variables.
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© Springer-Verlag New York, Inc. 1998