Geodesic
Trigonometric widths of Sobolev classes of functions on~$\boldsymbol R^n$
Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part 12, Tome 181 (1988), pp. 147-155.

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@article{TRSPY_1988_181_a8,
     author = {G. G. Magaril-Il'yaev},
     title = {Trigonometric widths of {Sobolev} classes of functions on~$\boldsymbol R^n$},
     journal = {Informatics and Automation},
     pages = {147--155},
     publisher = {mathdoc},
     volume = {181},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1988_181_a8/}
}
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EP  - 155
VL  - 181
PB  - mathdoc
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%A G. G. Magaril-Il'yaev
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%J Informatics and Automation
%D 1988
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%F TRSPY_1988_181_a8
G. G. Magaril-Il'yaev. Trigonometric widths of Sobolev classes of functions on~$\boldsymbol R^n$. Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part 12, Tome 181 (1988), pp. 147-155. http://geodesic.mathdoc.fr/item/TRSPY_1988_181_a8/