The corona problem for the algebra of bounded holomorphic functions on a complex manifold X asks whether X is dense in the maximal ideal space of the algebra. The problem is open for such algebras on general planar domains and on n-dimensional balls and polydisks, n ≥ 2. In this chapter, we show that the corona problem on the open unit polydisk \(\mathbb {D}^n\subset \mathbb C^n\) is equivalent to the corona problem on the countable disjoint union of open polydisks \(\mathbb {D}^n\times \mathbb {N}\) . It follows that the corona problem on \(\mathbb {D}^n\) is solvable if and only if the corresponding classes of Bezout equations have uniformly bounded solutions.

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On the Equivalence of the Corona and Strong Corona Problems for H∞ on a Polydisk

  • Alexander Brudnyi

摘要

The corona problem for the algebra of bounded holomorphic functions on a complex manifold X asks whether X is dense in the maximal ideal space of the algebra. The problem is open for such algebras on general planar domains and on n-dimensional balls and polydisks, n ≥ 2. In this chapter, we show that the corona problem on the open unit polydisk \(\mathbb {D}^n\subset \mathbb C^n\) is equivalent to the corona problem on the countable disjoint union of open polydisks \(\mathbb {D}^n\times \mathbb {N}\) . It follows that the corona problem on \(\mathbb {D}^n\) is solvable if and only if the corresponding classes of Bezout equations have uniformly bounded solutions.