Geodesic
An analog of Markov's theorem
Vestnik Tverskogo gosudarstvennogo universiteta. Seriâ Prikladnaâ matematika, no. 4 (2017), pp. 73-83

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In the space of functions summable on a segment, the sign of the best approximation for approximation by elements of a finite-dimensional cone, which is analogue of the well-known theorem of Markov A.A.
Keywords: banach space, closed convex set, summable function, best approximation, cone of finite dimension, extended cone
Mots-clés : interpolation polynomial. 
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     author = {I. A. Drozhzhin},
     title = {An analog of {Markov's} theorem},
     journal = {Vestnik Tverskogo gosudarstvennogo universiteta. Seri\^a Prikladna\^a matematika},
     pages = {73--83},
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     year = {2017},
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I. A. Drozhzhin. An analog of Markov's theorem. Vestnik Tverskogo gosudarstvennogo universiteta. Seriâ Prikladnaâ matematika, no. 4 (2017), pp. 73-83. http://geodesic.mathdoc.fr/item/VTPMK_2017_4_a5/