Abstract:
We study the relationship between the Banach—Mazur distance and the modified Banach—Mazur distance. We sharpen the Szarek theorem on the construction of invariant norms with specific properties and construct extremally distant normed spaces with norms invariant under groups of automorphisms of small cardinality. We prove that the trivial upper bound for the Banach—Mazur distance obtained in terms of the modified Banach—Mazur distance is order-sharp.
This publication is cited in the following 3 articles:
A. I. Khrabrov, “Volume ratio for the Cartesian product of convex bodies”, St. Petersburg Math. J., 32:5 (2021), 905–916
F. L. Bakharev, “Generalization of some classical results to the case of the modified Banach–Mazur distance”, J. Math. Sci. (N. Y.), 141:5 (2007), 1517–1525
F. L. Bakharev, “Estimation of maximal distances between spaces with norms invariant under a group of operators”, J. Math. Sci. (N. Y.), 141:5 (2007), 1526–1530