Geodesic
Extreme points of the complex binary trilinear ball
Studia Mathematica, Tome 138 (2000) no. 1, pp. 81-92 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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We characterize all the extreme points of the unit ball in the space of trilinear forms on the Hilbert space $ℂ^2$. This answers a question posed by R. Grząślewicz and K. John [7], who solved the corresponding problem for the real Hilbert space $ℝ^2$. As an application we determine the best constant in the inequality between the Hilbert-Schmidt norm and the norm of trilinear forms. 
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Fernando Cobos;  ;  . Extreme points of the complex binary trilinear ball. Studia Mathematica, Tome 138 (2000) no. 1, pp. 81-92. doi: 10.4064/sm-138-1-81-92

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