Nonexistence of simultaneously d2d_2-minimal and d2d_2-HI Banach spaces

For a finite-dimensional Banach space FF, let d2(F)d_2(F) denote its Banach–Mazur distance to the Euclidean space of the same dimension. A Banach space is d2d_2-minimal if it has the corresponding minimality property, and d2d_2-HI if it has the corresponding hereditarily indecomposable property. d2d_2-minimal/d2d_2-HI conjecture. A Banach space cannot be simultaneously d2d_2-minimal and d2d_2-HI. The conjecture is presented as a stronger form of the negative answer to whether a non-ergodic Banach space can be simultaneously d2d_2-minimal and d2d_2-HI. The source does not state a resolution.

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Primary source

W. Cuellar Carrera, N. de Rancourt and V. Ferenczi, “Local Banach-space dichotomies and ergodic spaces”, arXiv:2005.06458 (2021).

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