Geodesic
Approximation of abstract functions
Fundamentalʹnaâ i prikladnaâ matematika, Tome 3 (1997) no. 4, pp. 991-998.

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The paper is a short survey of results obtained mainly by S. B. Stechkin and S. I. Zukhovitsky in Chebyshev's problem on best approximation by means of polynomials generated by elements of a finite system of vector functions continuous on a compact set. The paper is dedicated to the memory of S. B. Stechkin. 
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     author = {V. A. Koshcheev},
     title = {Approximation of abstract functions},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
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     volume = {3},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1997_3_4_a5/}
}
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V. A. Koshcheev. Approximation of abstract functions. Fundamentalʹnaâ i prikladnaâ matematika, Tome 3 (1997) no. 4, pp. 991-998. http://geodesic.mathdoc.fr/item/FPM_1997_3_4_a5/