Best approximation and unique extension of Lipschitz functions

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Costica Mustata
Institutul de Calcul, Romania (ICTP)

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C. Mustata, Best approximation and unique extension of Lipschitz functions,  J. Approx. Theory, 19, 222-230, 1977,
doi: 10.1016/0021-9045(77)90053-3

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Journal of Approximation Theory

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[1] D.E BOOR, “On “Best” Interpolation,” Universky of Wisconsin, MRC 7% No. 1426, 1971.
[2] J. CZIPSER AND L. GEHER, Extension of function  satisfying a Eipschitz condition, hia Mut,k. ACM/. SC. Hungm. 6 (1955), 213-220.
[3] C. B. DUNHAM, Chebyshev approximation with a null space, Proc. Amer. Math. Sot. 41 (1973), 557-558.
[4] J. A. JOHNSON, Banach space of Lipschitz functions and vector-valued Lipschitz functions, Tuarzs. Amer. Math. Sot. 148 (1970), 147-169.
[5] C. MUSTATA, Asupra unor subspalii cebiseviene din spatiul normat al functiilor lipschitziene, Reo. Anal Mumer. Teoria Aproximatiei 2 (1973), 81-87.
[6] R. R. PHELPS, Uniqueness of Hahn-Banach extension and unique best approximation, Trans. Amer. Math. Sot. 95 (1960), 238-255.
[7] A. K. ROY, Extreme points and linear isometries of Banach space of Lipschitz functions, Canad. J. IWZ~A. 20 (1968), 1150-1164.
[8] I. SINGER, Cea mai buna aproximare in spalii vectoriale normate prin elemente din subspalii vectoriale, Edit. Acad. R. S. Romania, Bucuresti, (1967).
[9] D. R. SHERBERT, The structure of ideals and point derivations in Banach algebras of Lipschitz functions, Trans. Amer. Math. Sot. 111 (1964), 240-272.

1977

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