Pseudo-hyperbolic distance and n-best rational approximation in H^2 space
arXiv:2012.06184 · doi:10.1002/mma.7267
Abstract
Through reducing the problem to rational orthogonal system (Takenaka-Malmquist system), this note gives a proof for existence of n-best rational approximation to functions in the Hardy H2(D) space by using pseudohyperbolic distance.
9 pages