On Non-quasidiagonal Operators, II
Publications de l'Institut Mathématique, _N_S_54 (1993) no. 68, p. 58 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

For any operator $T$ on a Hilbert space, the properties of qd$(T)$, the modulus of quasidiagonality are studied. The notion of extremely non-quasidiagonal operators is introduced and studied.
Classification : 47A66 47A30
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     author = {S.C. Arora and Shiv Kumar Sahdev},
     title = {On {Non-quasidiagonal} {Operators,} {II}},
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S.C. Arora; Shiv Kumar Sahdev. On Non-quasidiagonal Operators, II. Publications de l'Institut Mathématique, _N_S_54 (1993) no. 68, p. 58 . http://geodesic.mathdoc.fr/item/PIM_1993_N_S_54_68_a9/