Un théorème de Helson pour des séries de Walsh
Abstract
Description
Extension to Walsh series of theorems of Helson and Katznelson on trigonometric series, saying that a trigonometric series whose partial sums are positive has its coefficients tend to zero but is not necessarily a Fourier-Lebesgue series
The paper was written for the 50th anniversary of Henry Helson's article and the 70th anniversary of Yitzhak Katznelson
The paper was written for the 50th anniversary of Henry Helson's article and the 70th anniversary of Yitzhak Katznelson