Abstract
We prove that Banach spaces ℓ1 ⊕2 R and X ⊕∞ Y , with strictly convex X and Y , have plastic unit balls (we call a metric space plastic if every non-expansive bijection from this space onto itself is an isometry).
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Schedule a callMore From: Acta et Commentationes Universitatis Tartuensis de Mathematica
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