
For a complex commutative Banach algebra \(\mathcal A\) with unit let \({\mathcal A}_{nk}\) denote the set of \(n\times k\) matrices over \(\mathcal A\). The author studies the following problem: For which matrices \(D\) in \({\mathcal A}_{nk}\) \((k
subalgebras of vector bundles, projective modules, Banach algebras of differentiable or analytic functions, \(H^p\)-spaces, Douglas algebras, Spaces of bounded analytic functions of one complex variable, matrices with values in Banach algebras
subalgebras of vector bundles, projective modules, Banach algebras of differentiable or analytic functions, \(H^p\)-spaces, Douglas algebras, Spaces of bounded analytic functions of one complex variable, matrices with values in Banach algebras
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