On Locating Isometric 𝓁(n)1
Anthony Weston · Canadian Mathematical Bulletin · 2001
Abstract Motivated by a question of Per Enflo, we develop a hypercube criterion for locating linear isometric copies of in an arbitrary real normed space X. The said criterion involves finding 2n points in X that satisfy one metric equality. This contrasts nicely to the standard classical criterion wherein one seeks n points that satisfy 2n−1 metric equalities.