Geodesic
$K$-functionals and best piecewice polynomial approximations
Modelirovanie i analiz informacionnyh sistem, Tome 14 (2007) no. 1, pp. 27-30

Voir la notice de l'article provenant de la source Math-Net.Ru

We prove exact relations between $K$-functionals of pairs $(C,C^l)$ and best uniform piecewice polynomial approximations of functions from $C$. 
@article{MAIS_2007_14_1_a3,
     author = {A. N. Morozov},
     title = {$K$-functionals and best piecewice polynomial approximations},
     journal = {Modelirovanie i analiz informacionnyh sistem},
     pages = {27--30},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAIS_2007_14_1_a3/}
}
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A. N. Morozov. $K$-functionals and best piecewice polynomial approximations. Modelirovanie i analiz informacionnyh sistem, Tome 14 (2007) no. 1, pp. 27-30. http://geodesic.mathdoc.fr/item/MAIS_2007_14_1_a3/