The original proof of the Littlewood conjecture was a special case of a more general inequality of functions whose Fourier coefficients have gaps. In this article, we prove similar inequalities, but treating the Fourier transform of a function integrable on the real line, rather than on the unit circle.
机构:
Beijing Normal Univ, Sch Math Sci, Beijing 100875, Peoples R China
Beijing Normal Univ, Lab Math & Complex Syst, Minist Educ, Beijing 100875, Peoples R ChinaBeijing Normal Univ, Sch Math Sci, Beijing 100875, Peoples R China