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Contractive Projections in $C_p$
註釋This work is devoted to the study of contractive projection (that is, norm-one idempotent operators) on Cp where Cp denotes the von Meumann-Schatten p-classes. The authors show that the range of a contractive projection on Cp(1 ?, p =2) is the direct sum of Cp-ideals of classical Cartan factors.