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"A Short Proof that Some Mappings of the Unit Ball of ℓ2 Are Never ..."
Jesús Ferrer, Enrique Llorens-Fuster (2020)
- Jesús Ferrer, Enrique Llorens-Fuster:
A Short Proof that Some Mappings of the Unit Ball of ℓ2 Are Never Nonexpansive. Am. Math. Mon. 127(4): 354-358 (2020)
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