Uniqueness of minimal projections onto two-dimensional subspaces
Tom 168 / 2005
Studia Mathematica 168 (2005), 273-284 MSC: Primary 41A65. DOI: 10.4064/sm168-3-6
We prove that minimal projections from $L_p$ ($1< p< \infty $) onto any two-dimensional subspace are unique. This result complements the theorems of W. Odyniec ([OL, Theorem I.1.3], [O3]). We also investigate the minimal number of norming points for such projections.