Geodesic
An upper bound for the Lipschitz retraction constant in $l_1$
Marco Annoni1 ; Emanuele Casini2
1 Via Salita Cappuccini 16 22100 Como, Italy
2 Dipartimento di Fisica e Matematica Università degli Studi dell'Insubria Via Valleggio 11 22100 Como, Italy
Studia Mathematica, Tome 180 (2007) no. 1, pp. 73-76 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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We construct a new lipschitzian retraction from the closed unit ball of the Banach space $l_1$ onto its boundary, with Lipschitz constant 8.
DOI : 10.4064/sm180-1-5
Keywords: construct lipschitzian retraction closed unit ball banach space its boundary lipschitz constant

Marco Annoni 1 ; Emanuele Casini 2

1 Via Salita Cappuccini 16 22100 Como, Italy
2 Dipartimento di Fisica e Matematica Università degli Studi dell'Insubria Via Valleggio 11 22100 Como, Italy 
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Marco Annoni; Emanuele Casini. An upper bound for the Lipschitz retraction constant in $l_1$. Studia Mathematica, Tome 180 (2007) no. 1, pp. 73-76. doi: 10.4064/sm180-1-5

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