@Article{ATA-39-309,
author = {Felder , Christopher},
title = {General Optimal Polynomial Approximants, Stabilization, and Projections of Unity},
journal = {Analysis in Theory and Applications},
year = {2023},
volume = {39},
number = {4},
pages = {309--329},
abstract = {<p style="text-align: justify;">In various Hilbert spaces of analytic functions on the unit disk, we characterize when a function has optimal polynomial approximants given by truncations of
a single power series or, equivalently, when the approximants stabilize. We also introduce a generalized notion of optimal approximant and use this to explicitly compute
orthogonal projections of 1 onto certain shift invariant subspaces.</p>},
issn = {1573-8175},
doi = {https://doi.org/10.4208/ata.OA-2020-0047},
url = {http://global-sci.org/intro/article_detail/ata/22300.html}
}