Geodesic
The Clarkson–Erdös theorem for several variables
Matematičeskie zametki, Tome 65 (1999) no. 4, pp. 594-598 
S. G. Merzlyakov. The Clarkson–Erdös theorem for several variables. Matematičeskie zametki, Tome 65 (1999) no. 4, pp. 594-598. http://geodesic.mathdoc.fr/item/MZM_1999_65_4_a10/
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     title = {The {Clarkson{\textendash}Erd\"os} theorem for several variables},
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     year = {1999},
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     url = {http://geodesic.mathdoc.fr/item/MZM_1999_65_4_a10/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] Clarkson J., Erdös P., “Approximation by polynomials”, Duke Math. Pures Appl., 14 (1935), 403–453

[2] Schwartz L., Étude des sommes d'exponentielles rèeles, Hermann, Paris, 1943 | Zbl

[3] Bernshtein S. N., Ekstremalnye svoistva mnogochlenov i nailuchshee priblizhenie nepreryvnykh funktsii odnoi peremennoi, AN SSSR, L.–M., 1937

[4] Merzlyakov S. G., “Teorema tipa Runge dlya invariantnykh prostranstv analiticheskikh otobrazhenii”, Izv. RAN. Ser. matem., 59:2 (1995), 163–178 | MR | Zbl