On the behavior of Fourier coefficients
On the behavior of Fourier coefficients
We write (3) 0(t) = f(x + t) f(x t), A(t) = f(x + t) f(x t) -1, where I is a finite number. It is known' that if &(t)-*O as t-0O, then the sequence { nBn(x) } is summable (C, r), r> 1, to the value 1/r, but not …