On trigonometric polynomials with coefficients $+1$, $-1$, $0$
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Theory of functions and related questions of analysis, Tome 180 (1987), pp. 131-132
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@article{TM_1987_180_a73,
author = {B. S. Kashin},
title = {On trigonometric polynomials with coefficients $+1$, $-1$,~$0$},
journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
pages = {131--132},
year = {1987},
volume = {180},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a73/}
}
B. S. Kashin. On trigonometric polynomials with coefficients $+1$, $-1$, $0$. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Theory of functions and related questions of analysis, Tome 180 (1987), pp. 131-132. http://geodesic.mathdoc.fr/item/TM_1987_180_a73/