Title: Extremum problems for functions with small support
Authors: N. N. Andreev, S. V. Konyagin, A. Yu. Popov
Journal title: Mathematical Notes
N. N. Andreev, S. V. Konyagin, A. Yu. Popov, “Extremum problems for functions with small support”, Mathematical Notes, 1996, 60:3, 241–247
In this paper we consider an extremum problem for even periodic functions having small intervals as their supports and subject to restrictions on the sum of the absolute values of their Fourier coefficients.
MathNet (ENG): http://mi.mathnet.ru/eng/mz1833