Dimensional gradations and cogradations of operator ideals. The weak distance between Banach-spaces
Séminaire d'Analyse fonctionnelle (dit "Maurey-Schwartz") (1980-1981), Exposé no. 9, 30 p. 
@article{SAF_1980-1981____A9_0,
     author = {Tomczak-Jaegermann, N.},
     title = {Dimensional gradations and cogradations of operator ideals. {The} weak distance between {Banach-spaces}},
     journal = {S\'eminaire d'Analyse fonctionnelle (dit "Maurey-Schwartz")},
     note = {talk:9},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1980-1981},
     zbl = {0538.47029},
     mrnumber = {659310},
     language = {en},
     url = {http://www.numdam.org/item/SAF_1980-1981____A9_0/}
}
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Tomczak-Jaegermann, N. Dimensional gradations and cogradations of operator ideals. The weak distance between Banach-spaces. Séminaire d'Analyse fonctionnelle (dit "Maurey-Schwartz") (1980-1981), Exposé no. 9, 30 p. http://www.numdam.org/item/SAF_1980-1981____A9_0/

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