Addendum to: Operator differentiable functions
The theory in the paper cited in the title [ibid. 13, No. 4, 461-487 (1990; Zbl 0731.46033)] should be restricted to spectral measures on the Borel \(\sigma\)-field of metric spaces, which causes almost no loss of generality.
spectral measures on the Borel \(\sigma\)-field of metric spaces
scientific article; zbMATH DE number 59727