Geodesic
Absolute completeness of systems of exponentials on convex compact sets
Sbornik. Mathematics, Tome 196 (2005) no. 12, pp. 1801-1814

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

Approximation using linear combinations of exponentials with special constraints on the coefficients is investigated. A sufficient condition for such approximation is stated in simple geometric terms. 
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     author = {I. F. Krasichkov-Ternovskii and G. N. Shilova},
     title = {Absolute completeness of systems of exponentials on convex compact sets},
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     pages = {1801--1814},
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     number = {12},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2005_196_12_a2/}
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I. F. Krasichkov-Ternovskii; G. N. Shilova. Absolute completeness of systems of exponentials on convex compact sets. Sbornik. Mathematics, Tome 196 (2005) no. 12, pp. 1801-1814. http://geodesic.mathdoc.fr/item/SM_2005_196_12_a2/