Two-dimensional Banach spaces with polynomial numerical index zero. (English) Zbl 1213.46015
Summary: We study two-dimensional Banach spaces with polynomial numerical indices equal to zero.
MSC:
| 46B04 | Isometric theory of Banach spaces |
| 46G25 | (Spaces of) multilinear mappings, polynomials |
| 47A12 | Numerical range, numerical radius |
References:
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