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math.CV2026
Metric projections, zeros of optimal polynomial approximants, and some extremal problems in Hardy spaces
Catherine Bénéteau, Raymond Cheng, Christopher Felder +3
The well-known proof of Beurling's Theorem in the Hardy space , which describes all shift-invariant subspaces, rests on calculating the orthogonal projection of the unit const…
math.CV2024
Some Remarks on Shanks-type Conjectures
Christopher Felder
We discuss the zero sets of two-variable polynomials as they relate to an approximation problem in the Hardy space on the bidisk.