## Computing 2-summing norm with few vectors.(English)Zbl 0436.47033

### MSC:

 47L10 Algebras of operators on Banach spaces and other topological linear spaces 47B10 Linear operators belonging to operator ideals (nuclear, $$p$$-summing, in the Schatten-von Neumann classes, etc.)

### Keywords:

2-summing norm; the type 2 constants; cotype 2 constants
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### References:

 [1] Figiel, T., Lindenstrauss, J., Milman, V., The dimension of almost spherical sections of convex bodies,Acta Math. 139 (1977) 53–94. · Zbl 0375.52002 [2] Figiel, T., Tomczak-Jaegermann, N., Projections onto Hilbertian subspaces of Banach spaces,Isreal J. Math., to appear · Zbl 0427.46010 [3] König, H., Retherford, J. R., Tomczak-Jaegermann, N., On the eigenvalues of (p, 2)-summing operators and constants associated with normed spaces, Preprint SFB 72 no. 243. · Zbl 0434.47033 [4] Lindenstrauss, J., Tzafriri, L.,Classical Banach spaces, Volume II, Springer Verlag, Berlin-Heidelberg-New York 1978. · Zbl 0259.46011 [5] Pietsch, A.,Operator ideals, Berlin 1979. · Zbl 0399.47039 [6] Problems of the Functional Analysis Winter School, Nowy Sacz 1978,Coll. Math., to appear
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