The linear isometry group of the Gurarij space is universal
Résumé
We give a construction of the Gurarij space, analogous to Katetov's construction of the Urysohn space. The adaptation of Katetov's technique uses a generalisation of the Arens-Eells enveloping space to metric space with a distinguished normed subspace. This allows us to give a positive answer to a question of Uspenskij, whether the linear isometry group of the Gurarij space is a universal Polish group.
Domaines
Logique [math.LO]
Origine : Fichiers produits par l'(les) auteur(s)
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