Elsevier, Indagationes Mathematicae, 2(13), p. 209-227, 2002
DOI: 10.1016/s0019-3577(02)80006-4
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Many operators in Banach spaces occur as the integration operator of a suitable vector measure; their compactness is completely described in [19]. However, many important spaces X in analysis (and integration operators in such spaces) do not fall into this scheme because X is not normable. Characterizing the compactness of integration operators in this setting is the aim of this note. The methods and techniques employed are quite different to the Banach space arguments used in [19].