## Ellipsoids defined by Banach ideal norms.(English)Zbl 0438.46006

### MSC:

 46B20 Geometry and structure of normed linear spaces 46B15 Summability and bases; functional analytic aspects of frames in Banach and Hilbert spaces 52A20 Convex sets in $$n$$ dimensions (including convex hypersurfaces)
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### References:

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