F John 1948: every convex body K contains a unique ellipsoid of maximal volume; if K is symmetric, John ellipsoid scaling factor sqrt(n) bounds Banach-Mazur distance to ball.
F John 1948: every convex body K contains a unique ellipsoid of maximal volume; if K is symmetric, John ellipsoid scaling factor sqrt(n) bounds Banach-Mazur distance to ball.