Abstract
It is shown that the sum and the product of two commuting Banach space operators with Dunford's property (C) have the single-valued extension property.
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Miller, T.L., Neumann, M.M. The single-valued extension property for sums and products of commuting operators. Czechoslovak Mathematical Journal 52, 635–642 (2002). https://doi.org/10.1023/A:1021788015637
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DOI: https://doi.org/10.1023/A:1021788015637