Doesn't anybody have an idea?
Hi,
I need some help with the following problem:
This is a lacunary fourier series which means that the series skips many terms. Because of this lacunary property the partial sums are essentially equal to the delayed means
If N' is the largest integer of the form and :
I don't see it, this must mean that , doesn't it? Why would this be true? Can anyone help me please?