On normal, formally normal and quasinormal composition operators in ell²-spaces
classification
🧮 math.FA
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normalcompositionoperatorsspacesformallyquasinormalactingcharacterized
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Unbounded composition operators in $L^2$-space over discrete measure spaces are investigated. Normal, formally normal and quasinormal composition operators acting in $L^2$-spaces of this kind are characterized.
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