Abstract/Summary

Since we published the paper [4] in 2015, the quantitative results we derive therein, and the summary we provide of results in the literature on interpolation spaces, have been of use in our own work (for example, [5]) and elsewhere (for example, [13]). But the paper as published is marred by inaccuracies which we correct in this note, including the inaccuracy flagged in [13, p. 1768]. We use throughout the notations of [4]. As in [4], we intend primarily that vector space, Banach space, and Hilbert space should be read as their complex versions. But, except where we deal with complex interpolation, the results below apply equally in the real case, with minor changes to the statements and proofs.