Results 251 to 260 of about 1,311,043 (300)

On Density of Fourier Coefficients

open access: yesCanadian Mathematical Bulletin, 1973
Letfbe anLintegrable real valued function of period 2π and let(1)be its Fourier series. It is known that iffis of bounded variation then allnanandnbn(n=1,2,3,…) lie in the interval [-V(F)/π, V(F)/π;] whereV(f) is the total variation off. M. Izumi and S.
Rafat N. Siddiqi
openaire   +2 more sources

3-D Seismic Inversion by Model Parameterization With Fourier Coefficients [PDF]

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 2023
In seismic inversion, the subsurface model can be parameterized by a truncated Fourier series, and the inversion problem is then the inversion of the Fourier coefficients.
Yanghua Wang, Ying Rao, Tong Zhu
exaly   +2 more sources

Simultaneous sign change of Fourier-coefficients of two cusp forms

open access: yesArchiv Der Mathematik, 2015
We consider the simultaneous sign change of Fourier coefficients of two modular forms with real Fourier coefficients. In an earlier work, the second author with Sengupta proved that two cusp forms of different (integral) weights with real algebraic ...
Winfried Kohnen, Sanoli Gun
exaly   +2 more sources

Fourier-Haar coefficients

Mathematical Notes of the Academy of Sciences of the USSR, 1984
A Banach lattice E is called p-concave, \(1\leq ...
Novikov, I. Ya., Semenov, E. M.
openaire   +2 more sources

ON FOURIER COEFFICIENTS

Mathematics of the USSR-Sbornik, 1981
Let be an orthonormal system of functions on the interval , and let the function . We investigate the question of the convergence or divergence (depending on the smoothness of the function ) of series of the form where or with .It is shown that in a certain sense, the assertions obtained are definitive for the Haar system.Bibliography: 14 titles.
openaire   +2 more sources

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