On the pointwise strong approximation by $(C,1)(E,1)$ means
Tom 79 / 2008
Banach Center Publications 79 (2008), 113-117
MSC: Primary 42A24.
DOI: 10.4064/bc79-0-8
Streszczenie
We present an estimate of the $( C,1) ( E,1) $-strong means with mixed powers of the Fourier series of a function $f\in L_{2\pi }$ as a generalization of the result obtained by M. Yildrim and F. Karakus. Some corollaries on the norm approximation are also given.
