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"On Exact Values of n-Widths in a Hilbert Space."
Georgii G. Magaril-Il'yaev, Konstantin Yu. Osipenko, Vladimir M. Tikhomirov (2001)
- Georgii G. Magaril-Il'yaev, Konstantin Yu. Osipenko, Vladimir M. Tikhomirov:
On Exact Values of n-Widths in a Hilbert Space. J. Approx. Theory 108(1): 97-117 (2001)
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