Geodesic
On Almost-Best Approximation by Piecewise Polynomial Functions in the Space $C[0,1]$
Matematičeskie zametki, Tome 78 (2005) no. 4, pp. 629-633.

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E. D. Livshits. On Almost-Best Approximation by Piecewise Polynomial Functions in the Space $C[0,1]$. Matematičeskie zametki, Tome 78 (2005) no. 4, pp. 629-633. http://geodesic.mathdoc.fr/item/MZM_2005_78_4_a15/

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