Recent publications

• Dariusz Piekarz, The uniqueness problem for the 3-point Nevanlinna-Pick extremal interpolation problem in the unit Euclidean ball in B^d, Bulletin des Sciences Mathematiques 211 (2026), 103820
• Dariusz Piekarz, The von Neumann inequality for 3 × 3 matrices in the unit Euclidean ball, Israel Journal of Mathematics 266 (2025), 487-497