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math.CV2022
Almost optimal polynomial approximation on convex sets in
Liudmyla Kryvonos
For a function , continuous on a compact convex set and analytic in its interior we construct a sequence of almost optimal polynomials that converge with a geometric rate at…
math.CV2021
Polynomial approximation of piecewise analytic functions on quasi-smooth arcs
Liudmyla Kryvonos
For a function that is piecewise analytic on a quasi-smooth arc and any we construct a sequence of "near-best" polynomials that converge at a rate $e^{-n^…